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Cover Page - shares	6 Months Ended
Cover Page - shares	Jun. 30, 2020	Jul. 13, 2020
Cover [Abstract]
Entity Registrant Name	Limelight Networks, Inc.
Document Type	10-Q
Entity Central Index Key	0001391127
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Period End Date	Jun. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-33508
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-1677033
Entity Address, Address Line One	1465 North Scottsdale Road
Entity Address, Address Line Two	Suite 400
Entity Address, City or Town	Scottsdale
Entity Address, State or Province	AZ
Entity Address, Postal Zip Code	85257
City Area Code	602
Local Phone Number	850-5000
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	LLNW
Security Exchange Name	NASDAQ
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding		122,072,457

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 18,200	$ 18,335
Accounts receivable, net	45,246	34,476
Income taxes receivable	68	82
Prepaid expenses and other current assets	10,241	9,920
Total current assets	73,755	62,813
Property and equipment, net	48,908	46,136
Operating lease right of use assets	11,449	12,842
Marketable securities, less current portion	40	40
Deferred income taxes	1,328	1,319
Goodwill	77,113	77,102
Other assets	7,915	9,117
Total assets	220,508	209,369
Current liabilities:
Accounts payable	17,004	12,020
Deferred revenue	934	976
Operating lease liability obligations	2,390	2,056
Income taxes payable	169	178
Other current liabilities	17,028	13,398
Total current liabilities	37,525	28,628
Operating lease liability obligations, less current portion	12,316	13,488
Deferred income taxes	283	239
Deferred revenue, less current portion	265	161
Other long-term liabilities	304	316
Total liabilities	50,693	42,832
Commitments and contingencies
Stockholders’ equity:
Convertible preferred stock, $0.001 par value; 7,500 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.001 par value; 300,000 shares authorized; 121,692 and 118,368 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively	122	118
Additional paid-in capital	541,363	530,285
Accumulated other comprehensive loss	(10,031)	(9,210)
Accumulated deficit	(361,639)	(354,656)
Total stockholders’ equity	169,815	166,537
Total liabilities and stockholders’ equity	$ 220,508	$ 209,369

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Convertible preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Convertible preferred stock, shares authorized	7,500,000	7,500,000
Convertible preferred stock, shares issued	0	0
Convertible preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	121,692,000	118,368,000
Common stock, shares outstanding	121,692,000	118,368,000

Unaudited Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Revenue	$ 58,546	$ 45,904	$ 115,558	$ 89,184
Cost of revenue:
Cost of services	29,389	22,769	60,502	45,710
Depreciation — network	5,360	4,628	10,510	8,944
Total cost of revenue	34,749	27,397	71,012	54,654
Gross profit	23,797	18,507	44,546	34,530
Operating expenses:
General and administrative	8,187	8,340	16,069	15,875
Sales and marketing	10,929	10,994	22,823	21,966
Research and development	5,572	6,013	11,189	11,915
Depreciation and amortization	323	127	665	372
Total operating expenses	25,011	25,474	50,746	50,128
Operating loss	(1,214)	(6,967)	(6,200)	(15,598)
Other income (expense):
Interest expense	(71)	(10)	(82)	(20)
Interest income	6	110	31	321
Other, net	(312)	(70)	(421)	(76)
Total other (expense) income	(377)	30	(472)	225
Loss before income taxes	(1,591)	(6,937)	(6,672)	(15,373)
Income tax expense	136	255	311	378
Net loss	$ (1,727)	$ (7,192)	$ (6,983)	$ (15,751)
Net loss per share:
Basic (in dollars per share)	$ (0.01)	$ (0.06)	$ (0.06)	$ (0.14)
Diluted (in dollars per share)	$ (0.01)	$ (0.06)	$ (0.06)	$ (0.14)
Weighted average shares used in per share calculation:
Basic (shares)	120,230	115,275	119,597	114,843
Diluted (shares)	120,230	115,275	119,597	114,843

Unaudited Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (1,727)	$ (7,192)	$ (6,983)	$ (15,751)
Other comprehensive income (loss), net of tax:
Unrealized gain on investments	0	8	0	37
Foreign currency translation (loss) gain	518	166	(821)	513
Other comprehensive income (loss)	518	174	(821)	550
Comprehensive loss	$ (1,209)	$ (7,018)	$ (7,804)	$ (15,201)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

Unaudited Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance, shares at Dec. 31, 2018		114,246,000
Beginning balance at Dec. 31, 2018	$ 165,151	$ 114	$ 513,682	$ (10,033)	$ (338,612)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(15,751)				(15,751)
Change in unrealized loss on available-for-sale investments, net of taxes	37			37
Foreign currency translation adjustment, net of taxes	513			513
Exercise of common stock options, shares		5,000
Exercise of common stock options	8		8
Vesting of restricted stock units, shares		1,566,000
Vesting of restricted stock units	0	$ 2	(2)
Restricted stock units surrendered in lieu of withholding taxes, shares		(506,000)
Restricted stock units surrendered in lieu of withholding taxes	(1,513)		(1,513)
Issuance of common stock under employee stock purchase plan, shares		449,000
Issuance of common stock under employee stock purchase plan	1,095		1,095
Share-based compensation	7,105		7,105
Ending balance, shares at Jun. 30, 2019		115,760,000
Ending balance at Jun. 30, 2019	156,645	$ 116	520,375	(9,483)	(354,363)
Beginning balance, shares at Mar. 31, 2019		114,874,000
Beginning balance at Mar. 31, 2019	159,538	$ 115	516,251	(9,657)	(347,171)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(7,192)				(7,192)
Change in unrealized loss on available-for-sale investments, net of taxes	8			8
Foreign currency translation adjustment, net of taxes	166			166
Vesting of restricted stock units, shares		638,000
Vesting of restricted stock units	0	$ 1	(1)
Restricted stock units surrendered in lieu of withholding taxes, shares		(201,000)
Restricted stock units surrendered in lieu of withholding taxes	(619)		(619)
Issuance of common stock under employee stock purchase plan, shares		449,000
Issuance of common stock under employee stock purchase plan	1,095		1,095
Share-based compensation	3,649		3,649
Ending balance, shares at Jun. 30, 2019		115,760,000
Ending balance at Jun. 30, 2019	$ 156,645	$ 116	520,375	(9,483)	(354,363)
Beginning balance, shares at Dec. 31, 2019	118,368,000	118,368,000
Beginning balance at Dec. 31, 2019	$ 166,537	$ 118	530,285	(9,210)	(354,656)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(6,983)				(6,983)
Change in unrealized loss on available-for-sale investments, net of taxes	0
Foreign currency translation adjustment, net of taxes	(821)			(821)
Exercise of common stock options, shares		1,860,000
Exercise of common stock options	5,011	$ 2	5,009
Vesting of restricted stock units, shares		1,745,000
Vesting of restricted stock units	7	$ 2	5
Restricted stock units surrendered in lieu of withholding taxes, shares		(581,000)
Restricted stock units surrendered in lieu of withholding taxes	(2,945)		(2,945)
Issuance of common stock under employee stock purchase plan, shares		300,000
Issuance of common stock under employee stock purchase plan	1,074		1,074
Share-based compensation	$ 7,935		7,935
Ending balance, shares at Jun. 30, 2020	121,692,000	121,692,000
Ending balance at Jun. 30, 2020	$ 169,815	$ 122	541,363	(10,031)	(361,639)
Beginning balance, shares at Mar. 31, 2020		119,642,000
Beginning balance at Mar. 31, 2020	163,864	$ 120	534,205	(10,549)	(359,912)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(1,727)				(1,727)
Change in unrealized loss on available-for-sale investments, net of taxes	0
Foreign currency translation adjustment, net of taxes	518			518
Exercise of common stock options, shares		1,162,000
Exercise of common stock options	2,872	$ 1	2,871
Vesting of restricted stock units, shares		869,000
Vesting of restricted stock units	7	$ 1	6
Restricted stock units surrendered in lieu of withholding taxes, shares		(281,000)
Restricted stock units surrendered in lieu of withholding taxes	(1,430)		(1,430)
Issuance of common stock under employee stock purchase plan, shares		300,000
Issuance of common stock under employee stock purchase plan	1,074		1,074
Share-based compensation	$ 4,637		4,637
Ending balance, shares at Jun. 30, 2020	121,692,000	121,692,000
Ending balance at Jun. 30, 2020	$ 169,815	$ 122	$ 541,363	$ (10,031)	$ (361,639)

Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating activities
Net loss	$ (6,983)	$ (15,751)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	11,175	9,316
Share-based compensation	10,315	7,105
Foreign currency remeasurement gain	(140)	(125)
Deferred income taxes	15	31
Gain on sale of property and equipment	0	(51)
Accounts receivable charges	313	694
Amortization of premium on marketable securities	0	20
Changes in operating assets and liabilities:
Accounts receivable	(11,083)	(5,751)
Prepaid expenses and other current assets	(447)	108
Income taxes receivable	13	(2)
Other assets	1,747	(3,422)
Accounts payable and other current liabilities	6,937	6,473
Deferred revenue	63	(445)
Income taxes payable	2	143
Payments related to litigation, net	0	(3,040)
Other long term liabilities	(11)	(152)
Net cash provided by (used in) operating activities	11,916	(4,849)
Investing activities
Purchases of marketable securities	0	(10,279)
Sale and maturities of marketable securities	0	31,153
Purchases of property and equipment	(14,948)	(16,474)
Proceeds from sale of property and equipment	0	46
Net cash used in investing activities	(14,948)	4,446
Financing activities
Payments of employee tax withholdings related to restricted stock vesting	(2,945)	(1,513)
Proceeds from employee stock plans	6,092	1,103
Net cash provided by (used in) financing activities	3,147	(410)
Effect of exchange rate changes on cash and cash equivalents	(250)	128
Net decrease in cash and cash equivalents	(135)	(685)
Cash and cash equivalents, beginning of period	18,335	25,383
Cash and cash equivalents, end of period	18,200	24,698
Supplemental disclosure of cash flow information
Cash paid during the period for interest	82	20
Cash paid during the period for income taxes, net of refunds	$ 261	$ 213

Nature of Business	6 Months Ended
Nature of Business	Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business	Nature of Business Limelight Networks Inc., a provider of digital content delivery, online video delivery, cloud security, edge computing and cloud storage services, empowers customers to provide exceptional digital experiences. Limelight’s edge services platform includes a globally distributed, high performance private network, intelligent software, and expert support services that enable current and future workflows. We were incorporated in Delaware in 2003, and have operated in the Phoenix metropolitan area since 2001 and elsewhere throughout the United States since 2003. We began international operations in 2004.

Summary of Significant Accounting Policies	6 Months Ended
Summary of Significant Accounting Policies	Jun. 30, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited interim consolidated financial statements have been prepared pursuant to the rules and regulations of the SEC. They do not include all of the information and footnotes required by U.S. generally accepted accounting principles (U.S. GAAP) for complete financial statements. Such interim financial information is unaudited but reflects all adjustments that are, in the opinion of management, necessary for the fair presentation of the interim periods presented and of a normal recurring nature. This quarterly report on Form 10-Q should be read in conjunction with our audited financial statements and footnotes included in our annual report on Form 10-K for the fiscal year ended December 31, 2019. All information is presented in thousands, except per share amounts and where specifically noted. The consolidated financial statements include accounts of Limelight and our wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated. In addition, certain other reclassifications have been made to prior year amounts to conform to the current year presentation. Use of Estimates The preparation of the consolidated financial statements and related disclosures in conformity with U.S. GAAP requires management to make judgments, assumptions, and estimates that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results and outcomes may differ from those estimates. The results of operations presented in this quarterly report on Form 10-Q are not necessarily indicative of the results that may be expected for the year ending December 31, 2020, or for any future periods. Recent Accounting Standards Adopted Accounting Standards In June 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-13, which requires measurement and recognition of expected credit losses for financial assets held. The standard is to be applied through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. We adopted this guidance effective January 1, 2020. The adoption of this guidance did not have a material impact on our consolidated financial statements and related disclosures and there was no cumulative-effect adjustment required. In January 2017, the FASB issued ASU 2017-04, which simplifies the accounting for goodwill impairment. The updated guidance eliminates Step 2 of the impairment test, which requires entities to calculate the implied fair value of goodwill to measure a goodwill impairment charge. Instead, entities will record an impairment charge based on the excess of a reporting unit’s carrying amount over its fair value, determined in Step 1. We adopted this guidance effective January 1, 2020, using a prospective approach. The adoption of this guidance did not have a material impact on our consolidated financial statements and related disclosures. In August 2018, the FASB issued ASU 2018-13, which removes, modifies and adds to the disclosure requirements on fair value measurements in Topic 820. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty should be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments should be applied retrospectively to all periods presented upon their effective date. An entity is permitted to early adopt any removed or modified disclosures upon issuance of this updated guidance and delay adoption of the additional disclosures until their effective date. We adopted this guidance effective January 1, 2020. The adoption of this guidance did not have a material impact on our consolidated financial statements and related disclosures. In August 2018, the FASB issued ASU 2018-15, to help entities evaluate the accounting for fees paid by a customer in a cloud computing arrangement (hosting arrangement) by providing guidance for determining when the arrangement includes a software license. The amendments align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments. We adopted this guidance effective January 1, 2020. The adoption of this guidance did not have a material impact on our consolidated financial statements and related disclosures. Revenue Recognition Revenues are recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. For contracts that contain minimum commitments over the contractual term, we estimate an amount of variable consideration by using either the expected value method or the most likely amount method. We include estimates of variable consideration in revenue only when we have a high degree of confidence that revenue will not be reversed in a subsequent reporting period. We believe that the expected value method is the most appropriate estimate of the amount of variable consideration. These customers have entered into contracts with contract terms generally from one to four years. As of June 30, 2020, we have approximately $4,372 of remaining unsatisfied performance obligations. We recognized revenue of approximately $1,943 and $2,500, respectively, during the three months ended June 30, 2020 and 2019, related to these types of contracts with our customers. During the six months ended June 30, 2020 and 2019, we recognized approximately $4,097 and $5,200, respectively. We expect to recognize approximately 60% of the remaining unsatisfied performance obligations in 2020, approximately 34% in 2021, and approximately 6% in 2022.

Accounts Receivable, net

6 Months Ended

Jun. 30, 2020

Receivables [Abstract]

Accounts Receivable, net

Accounts receivable, net include:


	June 30,		December 31,
	2020		2019
Accounts receivable	$	46,254	$	35,619
Less: credit allowance	(170)		(170)
Less: allowance for doubtful accounts	(838)		(973)
Total accounts receivable, net	$	45,246	$	34,476

All trade receivables are reported on the Consolidated Balance Sheets at their amortized cost adjusted for any write-offs and net of allowances for credit losses. We maintain an allowance for credit losses, which represents an estimate of expected losses of our receivables considering current market conditions and estimates for supportable forecasts when appropriate. The estimate is a result of our ongoing assessments and evaluations of collectability, historical loss experience, and future expectations in estimating credit losses for our trade receivables. For trade receivables, we apply a reserve percentage to the specific age of the receivable to estimate the allowance for doubtful accounts. The reserve percentages are determined based on our historical write-off experience. Determination of the proper amount of allowance requires management to exercise judgment about the timing, frequency and severity of potential credit losses that could materially affect the provision for credit losses and, as a result, net earnings. The allowance takes into consideration numerous quantitative and qualitative factors that include receivable type, historical loss experience, delinquency trends, collection experience, current economic conditions, estimates for supportable forecasts, when appropriate, and credit risk characteristics.

We evaluate the credit risk of the customer when extending credit based on a combination of various financial and qualitative factors that may affect our customers’ ability to pay. These factors may include the customer’s financial condition, past payment experience, and credit bureau information.

The following is a roll-forward of the allowances for doubtful accounts related to trade accounts receivable for the six months ended June 30, 2020:


			Six Months Ended
			June 30, 2020
Beginning of period			973
Provision for credit losses			313
Write-offs			(448)
End of period			838

Prepaid Expenses and Other Current Assets

6 Months Ended

Jun. 30, 2020

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets include:


	June 30,		December 31,
	2020		2019
Prepaid bandwidth and backbone	1,553		1,717
VAT receivable	3,096		3,068
Prepaid expenses and insurance	2,208		1,685
Vendor deposits and other	3,384		3,450
Total prepaid expenses and other current assets	$	10,241	$	9,920

Property and Equipment, net

6 Months Ended

Jun. 30, 2020

Property, Plant and Equipment [Abstract]

Property and Equipment, net

Property and equipment, net include:


	June 30,		December 31,
	2020		2019
Network equipment	$	132,298	$	126,975
Computer equipment and software	7,307		7,603
Furniture and fixtures	1,893		1,906
Leasehold improvements	7,925		7,888
Other equipment	31		54
Total property and equipment	149,454		144,426
Less: accumulated depreciation	(100,546)		(98,290)
Total property and equipment, net	$	48,908	$	46,136

Cost of revenue depreciation expense related to property and equipment was approximately $5,360 and $4,628, respectively, for the three months ended June 30, 2020 and 2019, respectively. For the six months ended June 30, 2020 and 2019, respectively, cost of revenue depreciation expense related to property and equipment was approximately $10,510 and $8,944, respectively.

Operating expense depreciation and amortization expense related to property and equipment was approximately $323 and $127, respectively, for the three months ended June 30, 2020 and 2019, respectively. For the six months ended June 30, 2020 and 2019, respectively, operating expense depreciation and amortization expense related to property and equipment was approximately $665 and $372, respectively.

Other Current Liabilities

6 Months Ended

Jun. 30, 2020

Other Liabilities Disclosure [Abstract]

Other Current Liabilities

Other current liabilities include:


	June 30,		December 31,
	2020		2019
Accrued compensation and benefits	$	8,832	$	4,918
Accrued cost of revenue	4,722		4,176
Other accrued expenses	3,474		4,304
Total other current liabilities	$	17,028	$	13,398

Line of Credit	6 Months Ended
Line of Credit	Jun. 30, 2020
Debt Disclosure [Abstract]
Line of Credit	Line of Credit In April 2020, we entered into a Fifth Amendment (Fifth Amendment) to the Loan and Security Agreement (the Credit Agreement) with Silicon Valley Bank (SVB) originally entered into in November 2015. Under the Fifth Amendment, the maximum principal commitment amount remained at $20,000. Our borrowing capacity is the lesser of the commitment amount or 80% of eligible accounts receivable. All outstanding borrowings owed under the Credit Agreement become due and payable no later than the extended final maturity date of November 2, 2022. As of June 30, 2020, and December 31, 2019, we had no outstanding borrowings, and we had availability under the Credit Agreement of approximately $20,000. As of June 30, 2020, borrowings under the Credit Agreement bear interest at the current prime rate minus 0.25%. In the event of default, obligations shall bear interest at a rate per annum that is 3% above the then applicable rate. Amendment fees and other commitment fees are included in interest expense. During the three months ended June 30, 2020 and 2019, there was no interest expense, and fees expense and amortization was $71 and $10, respectively. For the six months ended June 30, 2020 and 2019, there was no interest expense, and fees expense and amortization was $82 and $20, respectively. Any borrowings are secured by essentially all of our domestic personal property, with a negative pledge on intellectual property. SVB’s security interest in our foreign subsidiaries is limited to 65% of the voting stock of each such foreign subsidiary. We are required to maintain an Adjusted Quick Ratio of at least 1.0 to 1.0. We are also subject to certain customary limitations on our ability to, among other things, incur debt, grant liens, make acquisitions and other investments, make certain restricted payments such as dividends, dispose of assets or undergo a change in control. As of June 30, 2020, we were in compliance with our covenant under the Credit Agreement.

Contingencies	6 Months Ended
Contingencies	Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies Legal Matters We are subject to various legal proceedings and claims, either asserted or unasserted, arising in the ordinary course of business. While the outcome of these claims cannot be predicted with certainty, management does not believe the outcome of any of these matters will have a material adverse effect on our business, financial position, results of operations, or cash flows and accordingly, no legal contingencies were accrued as of June 30, 2020 and December 31, 2019. Litigation relating to the content delivery services industry is not uncommon, and we are, and from time to time have been, subject to such litigation. No assurances can be given with respect to the extent or outcome of any such litigation in the future. Taxes We are subject to indirect taxation in various states and foreign jurisdictions. Laws and regulations that apply to communications and commerce conducted over the Internet are becoming more prevalent, both in the United States and internationally, and may impose additional burdens on us conducting business online or providing Internet-related services. Increased regulation could negatively affect our business directly, as well as the businesses of our customers, which could reduce their demand for our services. For example, tax authorities in various states and abroad may impose taxes on the Internet-related revenue we generate based on regulations currently being applied to similar but not directly comparable industries. There are many transactions and calculations where the ultimate tax determination is uncertain. In addition, domestic and international taxation laws are subject to change. In the future, we may come under audit, which could result in changes to our tax estimates. We believe we maintain adequate tax reserves, that are not material in amount, to offset potential liabilities that may arise upon audit. Although we believe our tax estimates and associated reserves are reasonable, the final determination of tax audits and any related litigation could be materially different than the amounts established for tax contingencies. To the extent these estimates ultimately prove to be inaccurate, the associated reserves would be adjusted, resulting in the recording of a benefit or expense in the period in which a change in estimate or a final determination is made.

Net Loss per Share

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Net Loss per Share

Net Loss per Share We calculate basic and diluted loss per weighted average share. We use the weighted-average number of shares of common stock outstanding during the period for the computation of basic loss per share. Diluted loss per share include the

dilutive effect of all potentially dilutive common stock, including awards granted under our equity incentive compensation plans in the weighted-average number of shares of common stock outstanding.

The following table sets forth the components used in the computation of basic and diluted net loss per share for the periods indicated (in thousands, except per share data):


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Net loss	$	(1,727)	$	(7,192)	$	(6,983)	$	(15,751)
Basic weighted average outstanding shares of common stock	120,230		115,275		119,597		114,843
Basic weighted average outstanding shares of common stock	120,230		115,275		119,597		114,843
Dilutive effect of stock options, restricted stock units, and other equity incentive plans	—		—		—		—
Diluted weighted average outstanding shares of common stock	120,230		115,275		119,597		114,843
Basic net loss per share	$	(0.01)	$	(0.06)	$	(0.06)	$	(0.14)
Diluted net loss per share:	$	(0.01)	$	(0.06)	$	(0.06)	$	(0.14)

For the three and six months ended June 30, 2020 and 2019, respectively, the following potentially dilutive common stock, including awards granted under our equity incentive compensation plans were excluded from the computation of diluted net loss per share because including them would have been anti-dilutive.


	Three Months Ended June 30,			Six Months Ended June 30,
	2020	2019	2020	2019
Employee stock purchase plan	68	128	68	128
Stock options	6,510	2,425	6,232	2,243
Restricted stock units	1,764	779	1,846	890
	8,342	3,332	8,146	3,261

Stockholders' Equity	6 Months Ended
Stockholders' Equity	Jun. 30, 2020
Equity [Abstract]
Stockholders' Equity	Stockholders’ Equity Common Stock On March 14, 2017, our board of directors authorized a $25,000 share repurchase program. Any shares repurchased under this program will be canceled and returned to authorized but unissued status. During the six months ended June 30, 2020 and 2019, we did not repurchase any shares under the repurchase program. As of June 30, 2020, there remained $21,200 under this share repurchase program. Amended and Restated Equity Incentive Plan We established the 2007 Equity Incentive Plan, or the 2007 Plan, which allows for the grant of equity, including stock options and restricted stock unit awards. In June 2016, our stockholders approved the Amended and Restated 2007 Equity Incentive Plan, or the Restated 2007 Plan, which amended and restated the 2007 Plan. Approval of the Restated 2007 Plan replaced the terms and conditions of the 2007 Plan with the terms and conditions of the Restated 2007 Plan and extended the term of the plan to April 2026. There was no increase in the aggregate amount of shares available for issuance. The total number of shares authorized for issuance under the Restated 2007 Plan as of June 30, 2020 was approximately 10,525. Employee Stock Purchase Plan In June 2013, our stockholders approved our 2013 Employee Stock Purchase Plan (ESPP), authorizing the issuance of 4,000 shares. In May 2019, our stockholders approved the adoption of Amendment 1 to the ESPP. Amendment 1 increased the number of shares authorized to 9,000 shares (an increase of 5,000 shares) and amended the maximum number of shares of common stock that an eligible employee may be permitted to purchase during each offering period to be 5 shares. The ESPP allows participants to purchase our common stock at a 15% discount of the lower of the beginning or end of the offering period using the closing price on that day. During the three and six months ended June 30, 2020, we issued 300 shares under the ESPP. Total cash proceeds from the purchase of shares under the ESPP was approximately $1,075. As of June 30, 2020, shares reserved for issuance to employees under this plan totaled 3,940, and we held employee contributions of $299 (included in other current liabilities) for future purchases under the ESPP. Preferred Stock Our board of directors has authorized the issuance of up to 7,500 shares of preferred stock at June 30, 2020. The preferred stock may be issued in one or more series pursuant to a resolution or resolutions providing for such issuance duly adopted by the board of directors. As of June 30, 2020, the board of directors had not adopted any resolutions for the issuance of preferred stock.

Accumulated Other Comprehensive Loss

6 Months Ended

Jun. 30, 2020

Equity [Abstract]

Accumulated Other Comprehensive Loss

Changes in the components of accumulated other comprehensive loss, net of tax, for the six months ended June 30, 2020, was as follows:




	Foreign
	Currency
Balance, December 31, 2019	$	(9,210)
Other comprehensive loss before reclassifications	(821)
Amounts reclassified from accumulated other comprehensive loss	—
Net current period other comprehensive loss	(821)
Balance, June 30, 2020	$	(10,031)

Share-Based Compensation

6 Months Ended

Jun. 30, 2020

Share-based Payment Arrangement [Abstract]

Share-Based Compensation

The following table summarizes the components of share-based compensation expense included in our consolidated statements of operations:


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Share-based compensation expense by type:
Stock options	$	1,071	$	1,044	$	2,119	$	2,086
Restricted stock units	3,819		2,435		7,700		4,685
ESPP	361		170		496		334
Total share-based compensation expense	$	5,251	$	3,649	$	10,315	$	7,105
Share-based compensation expense:
Cost of services	$	792	$	377	$	1,555	$	788
General and administrative expense	2,257		2,140		4,498		4,234
Sales and marketing expense	1,322		598		2,550		1,082
Research and development expense	880		534		1,712		1,001
Total share-based compensation expense	$	5,251	$	3,649	$	10,315	$	7,105

Unrecognized share-based compensation expense totaled approximately $21,132 at June 30, 2020, of which $6,871 related to stock options and $14,261 related to restricted stock units. We currently expect to recognize share-based compensation expense of $6,446 during the remainder of 2020, $8,964 in 2021 and the remainder thereafter based on scheduled vesting of the stock options and restricted stock units outstanding at June 30, 2020.

We have recorded $2,376 of share based compensation expense during the six months ended June 30, 2020, related to restricted stock units issued and expected to be issued as part of our annual corporate bonus plan.

Operating Leases - Right of Use Assets and Purchase Commitments

6 Months Ended

Jun. 30, 2020

Commitments and Contingencies Disclosure [Abstract]

Operating Leases - Right of Use Assets and Purchase Commitments

Operating Leases - Right of Use Assets and Purchase CommitmentsRight of Use Assets

We have various operating leases for office space that expire through 2030. Below is a summary of our right of use assets and liabilities as of June 30, 2020.


Right-of-use assets	$	11,449

Lease liability obligations, current	$	2,390
Lease liability obligations, less current portion	12,316
Total lease liability obligations	$	14,706

Weighted-average remaining lease term	8.3 years

Weighted-average discount rate	5.05		%

During the three months ended June 30, 2020, we recognized approximately $794 in operating lease costs. Operating lease costs of $118 are included in cost of revenue, and $676 are included in operating expenses in our consolidated statements of operations. During the three months ended June 30, 2020, cash paid for operating leases was approximately $472. For the six months ended June 30, 2020, we recognized approximately $1,598 in operating lease costs. Operating lease costs of $249 are included in cost of revenue, and $1,349 are included in operating expenses in our consolidated statements of operations. For the six months ended June 30, 2020, cash paid for operating leases was approximately $965.

During the three months ended June 30, 2019, we recognized approximately $977 in operating lease costs. Operating lease costs of $147 are included in cost of revenue, and $830 are included in operating expenses in our consolidated statements of operations. During the three months ended June 30, 2019, cash paid for operating leases was approximately $464. For the six months ended June 30, 2019, we recognized approximately $1,943 in operating lease costs. Operating lease costs of $291 are included in cost of revenue, and $1,652 are included in operating expenses in our consolidated statements of operations. For the six months ended June 30, 2019, cash paid for operating leases was approximately $1,052.

Approximate future minimum lease payments for our right of use assets over the remaining lease periods as of June 30, 2020, are as follows:


Remainder of 2020	$	1,405
2021	3,048
2022	2,217
2023	1,740
2024	1,441
Thereafter	8,269
Total minimum payments	18,120
Less: amount representing interest	3,414
Total	$	14,706

Purchase Commitments

We have long-term commitments for bandwidth usage and co-location with various networks and Internet service providers. The following summarizes our minimum non-cancellable commitments for future periods as of June 30, 2020:


Remainder of 2020	$	20,973
2021	18,880
2022	5,739
2023	2,319
2024	344
Thereafter	—
Total minimum payments	$	48,255

Concentrations	6 Months Ended
Concentrations	Jun. 30, 2020
Risks and Uncertainties [Abstract]
Concentrations	Concentrations During the three and six months ended June 30, 2020, we had two customers, Amazon and Sony, who each represented 10% or more of our total revenue. During the three and six months ended June 30, 2019, we had one customer, Amazon, who represented 10% or more of our total revenue. Revenue from customers located within the United States, our country of domicile, was $35,605 for the three months ended June 30, 2020, compared to $28,087 for the three months ended June 30, 2019. For the six months ended June 30, 2020, revenue from customers located within the United States was $69,623, compared to $52,063 for the six months ended June 30, 2019. During the three and six months ended June 30, 2020 and 2019, based on customer location, we had three countries, the United States, Japan, and the United Kingdom, that accounted for 10% or more of our total revenue.

Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income taxes for the interim periods presented have been included in the accompanying consolidated financial statements on the basis of an estimated annual effective tax rate. Based on an estimated annual effective tax rate and discrete items, income tax expense for the three months ended June 30, 2020 and 2019, was $136 and $255, respectively. For the six months ended June 30, 2020 and 2019, income tax expense was $311 and $378, respectively. Income tax expense was different than the statutory income tax rate primarily due to us providing for a valuation allowance on deferred tax assets in certain jurisdictions, and the recording of state and foreign tax expense for the three month periods. We file income tax returns in jurisdictions with varying statutes of limitations. Tax years 2017 through 2019 remain subject to examination by federal tax authorities. Tax years 2016 through 2019 generally remain subject to examination by state tax authorities. As of June 30, 2020, we are not under any federal or state examination for income taxes. For the three and six months ended June 30, 2020 and 2019, there was no impact to income tax expense related to the Global Intangible Low-Taxed Income inclusion (GILTI) as a result of our net operating loss carryforwards (NOL) and valuation allowance position. We do not expect the GILTI to have a material impact on future earnings due to our NOL and valuation allowance position. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) was enacted in response to the COVID-19 pandemic. The CARES Act, among other things, permits NOL carryovers and carrybacks to offset 100% of taxable income for taxable years beginning before 2021. In addition, the CARES Act allows NOLs incurred in 2018, 2019, and 2020 to be carried back to each of the five preceding taxable years to generate a refund of previously paid income taxes. We are currently evaluating the impact of the CARES Act, but at present do not expect that the NOL carryback provision of the CARES Act would result in a cash benefit to us.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References + Details

Segment Reporting and Geographic Areas

6 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

Segment Reporting and Geographic Areas

Our chief operating decision maker (who is our Chief Executive Officer) reviews the financial information presented on a consolidated basis for purposes of allocating resources and evaluating our financial performance. We operate in one industry segment — content delivery and related services and we operate in three geographic areas — Americas, Europe, Middle East, and Africa (EMEA), and Asia Pacific.

Revenue by geography is based on the location of the customer from which the revenue is earned. The following table sets forth our revenue by geographic area:


	Three Months Ended June 30,															Six Months Ended June 30,
	2020						2019						2020					2019
Americas	$	36,343	62	%	$	28,970	63	%	$	71,058	62	%		$	54,005	61	%
EMEA	9,262		16	%	7,282		16	%	18,821		16	%		14,547		16	%
Asia Pacific	12,941		22	%	9,652		21	%	25,679		22	%		20,632		23	%
Total revenue	$	58,546	100	%	$	45,904	100	%	$	115,558	100	%		$	89,184	100	%

The following table sets forth the individual countries and their respective revenue for those countries whose revenue exceeded 10% of our total revenue:


	Three Months Ended June 30,						Six Months Ended June 30,
Country / Region	2020		2019		2020		2019
United States / Americas	$	35,605	$	28,087	$	69,623	$	52,063
United Kingdom / EMEA	$	7,483	$	5,285	$	15,077	$	10,414
Japan / Asia Pacific	$	8,326	$	5,682	$	16,548	$	11,505

The following table sets forth long-lived assets by geographic area in which the assets are located:


	June 30,		December 31,
	2020		2019
Americas	$	35,064	$	33,450
International	13,844		12,686
Total long-lived assets	$	48,908	$	46,136

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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+ Details

Summary of Significant Accounting Policies (Policies)	6 Months Ended
Summary of Significant Accounting Policies (Policies)	Jun. 30, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited interim consolidated financial statements have been prepared pursuant to the rules and regulations of the SEC. They do not include all of the information and footnotes required by U.S. generally accepted accounting principles (U.S. GAAP) for complete financial statements. Such interim financial information is unaudited but reflects all adjustments that are, in the opinion of management, necessary for the fair presentation of the interim periods presented and of a normal recurring nature. This quarterly report on Form 10-Q should be read in conjunction with our audited financial statements and footnotes included in our annual report on Form 10-K for the fiscal year ended December 31, 2019. All information is presented in thousands, except per share amounts and where specifically noted. The consolidated financial statements include accounts of Limelight and our wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated. In addition, certain other reclassifications have been made to prior year amounts to conform to the current year presentation.
Use of Estimates	Use of Estimates The preparation of the consolidated financial statements and related disclosures in conformity with U.S. GAAP requires management to make judgments, assumptions, and estimates that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results and outcomes may differ from those estimates. The results of operations presented in this quarterly report on Form 10-Q are not necessarily indicative of the results that may be expected for the year ending December 31, 2020, or for any future periods.
Recent Accounting Standards	Recent Accounting Standards Adopted Accounting Standards In June 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-13, which requires measurement and recognition of expected credit losses for financial assets held. The standard is to be applied through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. We adopted this guidance effective January 1, 2020. The adoption of this guidance did not have a material impact on our consolidated financial statements and related disclosures and there was no cumulative-effect adjustment required. In January 2017, the FASB issued ASU 2017-04, which simplifies the accounting for goodwill impairment. The updated guidance eliminates Step 2 of the impairment test, which requires entities to calculate the implied fair value of goodwill to measure a goodwill impairment charge. Instead, entities will record an impairment charge based on the excess of a reporting unit’s carrying amount over its fair value, determined in Step 1. We adopted this guidance effective January 1, 2020, using a prospective approach. The adoption of this guidance did not have a material impact on our consolidated financial statements and related disclosures. In August 2018, the FASB issued ASU 2018-13, which removes, modifies and adds to the disclosure requirements on fair value measurements in Topic 820. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty should be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments should be applied retrospectively to all periods presented upon their effective date. An entity is permitted to early adopt any removed or modified disclosures upon issuance of this updated guidance and delay adoption of the additional disclosures until their effective date. We adopted this guidance effective January 1, 2020. The adoption of this guidance did not have a material impact on our consolidated financial statements and related disclosures. In August 2018, the FASB issued ASU 2018-15, to help entities evaluate the accounting for fees paid by a customer in a cloud computing arrangement (hosting arrangement) by providing guidance for determining when the arrangement includes a software license. The amendments align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments. We adopted this guidance effective January 1, 2020. The adoption of this guidance did not have a material impact on our consolidated financial statements and related disclosures.
Revenue Recognition	Revenue Recognition Revenues are recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. For contracts that contain minimum commitments over the contractual term, we estimate an amount of variable consideration by using either the expected value method or the most likely amount method. We include estimates of variable consideration in revenue only when we have a high degree of confidence that revenue will not be reversed in a subsequent reporting period. We believe that the expected value method is the most appropriate estimate of the amount of variable consideration. These customers have entered into contracts with contract terms generally from one to four years. As of June 30, 2020, we have approximately $4,372 of remaining unsatisfied performance obligations. We recognized revenue of approximately $1,943 and $2,500, respectively, during the three months ended June 30, 2020 and 2019, related to these types of contracts with our customers. During the six months ended June 30, 2020 and 2019, we recognized approximately $4,097 and $5,200, respectively. We expect to recognize approximately 60% of the remaining unsatisfied performance obligations in 2020, approximately 34% in 2021, and approximately 6% in 2022.

- Definition

Disclosure of accounting policy for revenue from contract with customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130566-203045

+ Details

Accounts Receivable, net (Tables)

6 Months Ended

Jun. 30, 2020

Receivables [Abstract]

Summary of Accounts Receivable and Allowances for Doubtful Accounts

Accounts receivable, net include:


	June 30,		December 31,
	2020		2019
Accounts receivable	$	46,254	$	35,619
Less: credit allowance	(170)		(170)
Less: allowance for doubtful accounts	(838)		(973)
Total accounts receivable, net	$	45,246	$	34,476

The following is a roll-forward of the allowances for doubtful accounts related to trade accounts receivable for the six months ended June 30, 2020:


			Six Months Ended
			June 30, 2020
Beginning of period			973
Provision for credit losses			313
Write-offs			(448)
End of period			838

Prepaid Expenses and Other Current Assets (Tables)

6 Months Ended

Jun. 30, 2020

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets include:


	June 30,		December 31,
	2020		2019
Prepaid bandwidth and backbone	1,553		1,717
VAT receivable	3,096		3,068
Prepaid expenses and insurance	2,208		1,685
Vendor deposits and other	3,384		3,450
Total prepaid expenses and other current assets	$	10,241	$	9,920

Property and Equipment, net (Tables)

6 Months Ended

Jun. 30, 2020

Property, Plant and Equipment [Abstract]

Schedule of Property and Equipment

Property and equipment, net include:


	June 30,		December 31,
	2020		2019
Network equipment	$	132,298	$	126,975
Computer equipment and software	7,307		7,603
Furniture and fixtures	1,893		1,906
Leasehold improvements	7,925		7,888
Other equipment	31		54
Total property and equipment	149,454		144,426
Less: accumulated depreciation	(100,546)		(98,290)
Total property and equipment, net	$	48,908	$	46,136

Other Current Liabilities (Tables)

6 Months Ended

Jun. 30, 2020

Other Liabilities Disclosure [Abstract]

Schedule of Other Current Liabilities

Other current liabilities include:


	June 30,		December 31,
	2020		2019
Accrued compensation and benefits	$	8,832	$	4,918
Accrued cost of revenue	4,722		4,176
Other accrued expenses	3,474		4,304
Total other current liabilities	$	17,028	$	13,398

Net Loss per Share (Tables)

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Loss per Share

The following table sets forth the components used in the computation of basic and diluted net loss per share for the periods indicated (in thousands, except per share data):


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Net loss	$	(1,727)	$	(7,192)	$	(6,983)	$	(15,751)
Basic weighted average outstanding shares of common stock	120,230		115,275		119,597		114,843
Basic weighted average outstanding shares of common stock	120,230		115,275		119,597		114,843
Dilutive effect of stock options, restricted stock units, and other equity incentive plans	—		—		—		—
Diluted weighted average outstanding shares of common stock	120,230		115,275		119,597		114,843
Basic net loss per share	$	(0.01)	$	(0.06)	$	(0.06)	$	(0.14)
Diluted net loss per share:	$	(0.01)	$	(0.06)	$	(0.06)	$	(0.14)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share


	Three Months Ended June 30,			Six Months Ended June 30,
	2020	2019	2020	2019
Employee stock purchase plan	68	128	68	128
Stock options	6,510	2,425	6,232	2,243
Restricted stock units	1,764	779	1,846	890
	8,342	3,332	8,146	3,261

Accumulated Other Comprehensive Loss (Tables)

6 Months Ended

Jun. 30, 2020

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Loss

Changes in the components of accumulated other comprehensive loss, net of tax, for the six months ended June 30, 2020, was as follows:




	Foreign
	Currency
Balance, December 31, 2019	$	(9,210)
Other comprehensive loss before reclassifications	(821)
Amounts reclassified from accumulated other comprehensive loss	—
Net current period other comprehensive loss	(821)
Balance, June 30, 2020	$	(10,031)

Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2020

Share-based Payment Arrangement [Abstract]

Components of Share-based Compensation Expense

The following table summarizes the components of share-based compensation expense included in our consolidated statements of operations:


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Share-based compensation expense by type:
Stock options	$	1,071	$	1,044	$	2,119	$	2,086
Restricted stock units	3,819		2,435		7,700		4,685
ESPP	361		170		496		334
Total share-based compensation expense	$	5,251	$	3,649	$	10,315	$	7,105
Share-based compensation expense:
Cost of services	$	792	$	377	$	1,555	$	788
General and administrative expense	2,257		2,140		4,498		4,234
Sales and marketing expense	1,322		598		2,550		1,082
Research and development expense	880		534		1,712		1,001
Total share-based compensation expense	$	5,251	$	3,649	$	10,315	$	7,105

Operating Leases - Right of Use Assets and Purchase Commitments (Tables)

6 Months Ended

Jun. 30, 2020

Commitments and Contingencies Disclosure [Abstract]

Summary of Right-of-use Assets and Lease Liabilities

Below is a summary of our right of use assets and liabilities as of June 30, 2020.


Right-of-use assets	$	11,449

Lease liability obligations, current	$	2,390
Lease liability obligations, less current portion	12,316
Total lease liability obligations	$	14,706

Weighted-average remaining lease term	8.3 years

Weighted-average discount rate	5.05		%

Future Minimum Lease Payments Over Remaining Lease Periods

Approximate future minimum lease payments for our right of use assets over the remaining lease periods as of June 30, 2020, are as follows:


Remainder of 2020	$	1,405
2021	3,048
2022	2,217
2023	1,740
2024	1,441
Thereafter	8,269
Total minimum payments	18,120
Less: amount representing interest	3,414
Total	$	14,706

Minimum Purchase Commitments

The following summarizes our minimum non-cancellable commitments for future periods as of June 30, 2020:


Remainder of 2020	$	20,973
2021	18,880
2022	5,739
2023	2,319
2024	344
Thereafter	—
Total minimum payments	$	48,255

Segment Reporting and Geographic Areas (Tables)

6 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

Revenue Earned by Geographic Area

The following table sets forth our revenue by geographic area:


	Three Months Ended June 30,															Six Months Ended June 30,
	2020						2019						2020					2019
Americas	$	36,343	62	%	$	28,970	63	%	$	71,058	62	%		$	54,005	61	%
EMEA	9,262		16	%	7,282		16	%	18,821		16	%		14,547		16	%
Asia Pacific	12,941		22	%	9,652		21	%	25,679		22	%		20,632		23	%
Total revenue	$	58,546	100	%	$	45,904	100	%	$	115,558	100	%		$	89,184	100	%

Schedule of Concentration of Revenue by Country

The following table sets forth the individual countries and their respective revenue for those countries whose revenue exceeded 10% of our total revenue:


	Three Months Ended June 30,						Six Months Ended June 30,
Country / Region	2020		2019		2020		2019
United States / Americas	$	35,605	$	28,087	$	69,623	$	52,063
United Kingdom / EMEA	$	7,483	$	5,285	$	15,077	$	10,414
Japan / Asia Pacific	$	8,326	$	5,682	$	16,548	$	11,505

Long-lived Assets by Geographical Area

The following table sets forth long-lived assets by geographic area in which the assets are located:


	June 30,		December 31,
	2020		2019
Americas	$	35,064	$	33,450
International	13,844		12,686
Total long-lived assets	$	48,908	$	46,136

Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accounting Policies [Abstract]
Contract terms			These customers have entered into contracts with contract terms generally from one to four years.
Committed revenue from minimum commitment contracts	$ 4,372		$ 4,372
Minimum commitment contracts revenue recognized in period	$ 1,943	$ 2,500	$ 4,097	$ 5,200

Summary of Significant Accounting Policies - Performance Obligations (Details)	Jun. 30, 2020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining unsatisfied performance obligations to be recognized period	6 months
Percent of remaining unsatisfied performance obligations to be recognized	60.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining unsatisfied performance obligations to be recognized period	1 year
Percent of remaining unsatisfied performance obligations to be recognized	34.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining unsatisfied performance obligations to be recognized period	1 year
Percent of remaining unsatisfied performance obligations to be recognized	6.00%

Accounts Receivable, net (Details) - USD ($) $ in Thousands	6 Months Ended
Accounts Receivable, net (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Dec. 31, 2019
Summary of Accounts Receivable, net
Accounts receivable			$ 46,254	$ 35,619
Less: credit allowance			(170)	(170)
Less: allowance for doubtful accounts	$ (973)		(838)	(973)
Total accounts receivable, net			$ 45,246	$ 34,476
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning of period	973
Provision for credit losses	313	$ 694
Write-offs	(448)
End of period	$ 838

Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid bandwidth and backbone	$ 1,553	$ 1,717
VAT receivable	3,096	3,068
Prepaid expenses and insurance	2,208	1,685
Vendor deposits and other	3,384	3,450
Total prepaid expenses and other current assets	$ 10,241	$ 9,920

Property and Equipment, net - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Property and equipment, net
Total property and equipment	$ 149,454	$ 144,426
Less: accumulated depreciation	(100,546)	(98,290)
Total property and equipment, net	48,908	46,136
Network equipment
Property and equipment, net
Total property and equipment	132,298	126,975
Computer equipment and software
Property and equipment, net
Total property and equipment	7,307	7,603
Furniture and fixtures
Property and equipment, net
Total property and equipment	1,893	1,906
Leasehold improvements
Property and equipment, net
Total property and equipment	7,925	7,888
Other equipment
Property and equipment, net
Total property and equipment	$ 31	$ 54

Property and Equipment, net - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Property, Plant and Equipment [Abstract]
Cost of revenue depreciation expense	$ 5,360	$ 4,628	$ 10,510	$ 8,944
Operating expense depreciation	$ 323	$ 127	$ 665	$ 372

Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Accrued compensation and benefits	$ 8,832	$ 4,918
Accrued cost of revenue	4,722	4,176
Other accrued expenses	3,474	4,304
Total other current liabilities	$ 17,028	$ 13,398

Line of Credit (Details) - Revolving Credit Facility - Credit Agreement - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended
	Apr. 30, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Line of Credit Facility [Line Items]
Maximum borrowing amount	$ 20,000,000
Borrowing capacity limit, percent of accounts receivable	80.00%
Proceeds from line of credit		$ 0		$ 0		$ 0
Current borrowing capacity		$ 20,000,000		$ 20,000,000		$ 20,000,000
Increase in interest rate in event of default		3.00%		3.00%
Interest expense		$ 0	$ 0	$ 0	$ 0
Commitment fees amortization		$ 71,000	$ 10,000	$ 82,000	$ 20,000
Voting stock percentage in foreign subsidiaries				65.00%
Line of credit facility, covenant compliance, adjusted quick ratio		1.0		1.0
Alternative Base Rate
Line of Credit Facility [Line Items]
Variable rate minimum				0.25%

Net Loss per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net loss	$ (1,727)	$ (7,192)	$ (6,983)	$ (15,751)
Basic weighted average outstanding shares of common stock	120,230	115,275	119,597	114,843
Dilutive effect of stock options, restricted stock units, and other equity incentive plans (in shares)	0	0	0	0
Diluted weighted average outstanding shares of common stock	120,230	115,275	119,597	114,843
Basic net loss per share (in dollars per share)	$ (0.01)	$ (0.06)	$ (0.06)	$ (0.14)
Diluted net loss per share (in dollars per share)	$ (0.01)	$ (0.06)	$ (0.06)	$ (0.14)

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Net Loss per Share - Dilutive Common Stock (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded outstanding options and restricted stock units (in shares)	8,342	3,332	8,146	3,261
Employee stock purchase plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded outstanding options and restricted stock units (in shares)	68	128	68	128
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded outstanding options and restricted stock units (in shares)	6,510	2,425	6,232	2,243
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded outstanding options and restricted stock units (in shares)	1,764	779	1,846	890

Stockholders' Equity (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended
Stockholders' Equity (Details) - USD ($)	May 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Mar. 14, 2017	Sep. 30, 2013
Equity, Class of Treasury Stock [Line Items]
Issuance of common stock under employee stock purchase plan		$ 1,074,000	$ 1,095,000	$ 1,074,000	$ 1,095,000
Issuance of preferred stock authorized (in shares)		7,500,000		7,500,000		7,500,000
Employee Stock Purchase Plan
Equity, Class of Treasury Stock [Line Items]
Number of shares authorized for issuance	9,000,000							4,000,000
Increase in shares available for issuance	5,000,000
Maximum number of shares permitted to purchase per period	5,000
Discount from market price for employees				15.00%
Shares issued		300,000		300,000
Issuance of common stock under employee stock purchase plan		$ 1,075,000		$ 1,075,000
Common Stock reserved for future options and restricted stock awards (in shares)		3,940,000		3,940,000
Employee funds held by company for future purchase of shares		$ 299,000		$ 299,000
2007 Equity Incentive Plan
Equity, Class of Treasury Stock [Line Items]
Number of shares authorized for issuance		10,525,000		10,525,000
2017 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase amount authorized							$ 25,000,000
Shares purchased and canceled				0	0
Remaining authorized repurchase amount		$ 21,200,000		$ 21,200,000

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 163,864	$ 159,538	$ 166,537	$ 165,151
Other comprehensive income (loss)	518	174	(821)	550
Ending balance	169,815	156,645	169,815	156,645
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(10,549)	(9,657)	(9,210)	(10,033)
Other comprehensive loss before reclassifications			(821)
Amounts reclassified from accumulated other comprehensive loss			0
Other comprehensive income (loss)			(821)
Ending balance	$ (10,031)	$ (9,483)	$ (10,031)	$ (9,483)

- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

+ References + Details

Share-Based Compensation - Components of Share-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Components of share-based compensation expense
Share-based compensation	$ 5,251	$ 3,649	$ 10,315	$ 7,105
Cost of services
Components of share-based compensation expense
Share-based compensation	792	377	1,555	788
General and administrative expense
Components of share-based compensation expense
Share-based compensation	2,257	2,140	4,498	4,234
Sales and marketing expense
Components of share-based compensation expense
Share-based compensation	1,322	598	2,550	1,082
Research and development expense
Components of share-based compensation expense
Share-based compensation	880	534	1,712	1,001
Stock options
Components of share-based compensation expense
Share-based compensation	1,071	1,044	2,119	2,086
Restricted stock units
Components of share-based compensation expense
Share-based compensation	3,819	2,435	7,700	4,685
ESPP
Components of share-based compensation expense
Share-based compensation	$ 361	$ 170	$ 496	$ 334

Share-Based Compensation - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation expense total	$ 21,132		$ 21,132
Share-based compensation expense, remainder of year	6,446		6,446
Share-based compensation expense, 2021	8,964		8,964
Share-based compensation expense	5,251	$ 3,649	10,315	$ 7,105
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation expense total	6,871		6,871
Share-based compensation expense	1,071	1,044	2,119	2,086
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation expense total	14,261		14,261
Share-based compensation expense	$ 3,819	$ 2,435	7,700	$ 4,685
Annual Corporate Bonus Plan \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense			$ 2,376

Operating Leases - Right of Use Assets and Purchase Commitments - Right-of-use Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Operating Leased Assets [Line Items]
Right-of-use assets	$ 11,449		$ 11,449		$ 12,842
Operating lease liability obligations	2,390		2,390		2,056
Operating lease liability obligations, less current portion	12,316		12,316		$ 13,488
Total lease liability obligations	$ 14,706		$ 14,706
Weighted-average remaining lease term	8 years 3 months 18 days		8 years 3 months 18 days
Weighted-average discount rate	5.05%		5.05%
Operating lease costs	$ 794	$ 977	$ 1,598	$ 1,943
Operating cash flows from operating leases	472	464	965	1,052
Cost of Revenue
Operating Leased Assets [Line Items]
Operating lease costs	118	147	249	291
Operating Expenses
Operating Leased Assets [Line Items]
Operating lease costs	$ 676	$ 830	$ 1,349	$ 1,652

Operating Leases - Right of Use Assets and Purchase Commitments - Future Minimum Lease Payments Over Remaining Lease Periods (Details) $ in Thousands	Jun. 30, 2020 USD ($)
Future minimum lease payments over remaining lease periods
Remainder of 2020	$ 1,405
2021	3,048
2022	2,217
2023	1,740
2024	1,441
Thereafter	8,269
Total minimum payments	18,120
Less: amount representing interest	3,414
Total	$ 14,706

Operating Leases - Right of Use Assets and Purchase Commitments - Minimum Purchase Commitments (Details) $ in Thousands	Jun. 30, 2020 USD ($)
Minimum purchase commitments
Remainder of 2020	$ 20,973
2021	18,880
2022	5,739
2023	2,319
2024	344
Thereafter	0
Total minimum payments	$ 48,255

Concentrations (Details) $ in Thousands	3 Months Ended		6 Months Ended
Concentrations (Details) $ in Thousands	Jun. 30, 2020 USD ($) customer country	Jun. 30, 2019 USD ($) customer country	Jun. 30, 2020 USD ($) customer country	Jun. 30, 2019 USD ($) customer country
Concentration Risk [Line Items]
Number of customers who represented 10% or more of total revenue \| customer	2	1	2	1
Revenue	$ 58,546	$ 45,904	$ 115,558	$ 89,184
Geographic concentration \| Sales revenue
Concentration Risk [Line Items]
Number of countries accounting for 10% or more of revenue \| country	3	3	3	3
United States / Americas \| Geographic concentration \| Sales revenue
Concentration Risk [Line Items]
Revenue	$ 35,605	$ 28,087	$ 69,623	$ 52,063

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

+ Details

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Income Taxes (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income tax expense	$ 136	$ 255	$ 311	$ 378

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Segment Reporting and Geographic Areas - Narrative (Details)	6 Months Ended
	Jun. 30, 2020 Segment Location
Segment Reporting [Abstract]
Number of industry segment \| Segment	1
Number of geographic areas \| Location	3

Segment Reporting and Geographic Areas - Revenue Earned by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue earned by geographic area
Revenue	$ 58,546	$ 45,904	$ 115,558	$ 89,184
Americas
Revenue earned by geographic area
Revenue	36,343	28,970	71,058	54,005
EMEA
Revenue earned by geographic area
Revenue	9,262	7,282	18,821	14,547
Asia Pacific
Revenue earned by geographic area
Revenue	$ 12,941	$ 9,652	$ 25,679	$ 20,632
Sales revenue \| Geographic concentration
Revenue earned by geographic area
Percent of revenue	100.00%	100.00%	100.00%	100.00%
Sales revenue \| Geographic concentration \| Americas
Revenue earned by geographic area
Percent of revenue	62.00%	63.00%	62.00%	61.00%
Sales revenue \| Geographic concentration \| EMEA
Revenue earned by geographic area
Percent of revenue	16.00%	16.00%	16.00%	16.00%
Sales revenue \| Geographic concentration \| Asia Pacific
Revenue earned by geographic area
Percent of revenue	22.00%	21.00%	22.00%	23.00%

- Definition

+ References

+ Details

Segment Reporting and Geographic Areas - Schedule of Concentration of Revenue by Country (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Concentration Risk [Line Items]
Revenue	$ 58,546	$ 45,904	$ 115,558	$ 89,184
Geographic concentration \| Sales revenue \| United States / Americas
Concentration Risk [Line Items]
Revenue	35,605	28,087	69,623	52,063
Geographic concentration \| Sales revenue \| United Kingdom / EMEA
Concentration Risk [Line Items]
Revenue	7,483	5,285	15,077	10,414
Geographic concentration \| Sales revenue \| Japan / Asia Pacific
Concentration Risk [Line Items]
Revenue	$ 8,326	$ 5,682	$ 16,548	$ 11,505

- Definition

+ References

+ Details

Segment Reporting and Geographic Areas - Long-lived Assets by Geographical Area (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Long-lived assets by geographical area
Long-lived assets	$ 48,908	$ 46,136
Americas
Long-lived assets by geographical area
Long-lived assets	35,064	33,450
International
Long-lived assets by geographical area
Long-lived assets	$ 13,844	$ 12,686