Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2019

Balance Sheet Related Disclosures [Abstract]

Schedule of Allowance for Doubtful Accounts

The activity in the accounts receivable reserves was as follows:

	As of December 31,
	2019			2018
	(in thousands)
Beginning balance	$	1,679		$	1,119
Additions to the reserves	360			599
Write-offs/adjustments	(223		)	(39		)
Ending balance	$	1,816		$	1,679

Schedule of Property and Equipment, Net

The estimated useful life of each asset category is as follows:

Computer and networking equipment	3-5 years
Leasehold improvements	Shorter of lease term or 5 years
Furniture and fixtures	3 years
Office equipment	3 years
Internal-use software	3 years

Property and equipment, net consisted of the following:

	As of December 31,
	2019			2018
	(in thousands)
Computer and networking equipment	$	89,830		$	65,060
Leasehold improvements	3,285			3,259
Furniture and fixtures	681			539
Office equipment	579			513
Internal-use software	13,901			8,604
Property and equipment, gross	108,276			77,975
Accumulated depreciation and amortization	(48,239		)	(35,621		)
Property and equipment, net	$	60,037		$	42,354

Schedule of Accrued Expenses

Accrued expenses consisted of the following:

	As of December 31,
	2019		2018
	(in thousands)
Accrued compensation and related benefits	8,734		3,952
Sales and use tax payable	3,938		3,077
Accrued colocation and bandwidth costs	3,237		3,049
Other accrued liabilities	3,969		5,457
Total accrued expenses	$	19,878	$	15,535

Schedule of Other Current Liabilities

Other current liabilities consisted of the following:

	As of December 31,
	2019		2018
	(in thousands)
Liability for early-exercised stock options (see Note 11)	$	467	$	597
Deferred revenue	317		1,622
Accrued computer and networking equipment	7,060		—
Other current liabilities	325		293
Total other current liabilities	$	8,169	$	2,512

Other Long-Term Liabilities

Other long-term liabilities consisted of the following:

	As of December 31,
	2019		2018
	(in thousands)
Deferred rent	$	634	$	272
Other long-term liabilities	404		375
Total other long-term liabilities	$	1,038	$	647

Schedule of Accumulated Other Comprehensive Loss

The following table summarizes the changes in accumulated other comprehensive loss, which is reported as a component of stockholders’ equity (deficit):

	Foreign Currency Translation			Available-for-sale investments			Accumulated Other Comprehensive Income (Loss)
	(in thousands)
Balance at January 1, 2017	$	(43	)	$	(6	)	$	(49	)
Other comprehensive income (loss)	32			(7		)	25
Balance at December 31, 2017	(11		)	(13		)	(24		)
Other comprehensive income (loss)	(1		)	(11		)	(12		)
Balance at December 31, 2018	(12		)	(24		)	(36		)
Other comprehensive income (loss)	111			121			232
Balance at December 31, 2019	$	99		$	97		196