Balance Sheet Components (Tables)

9 Months Ended

Sep. 30, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Debt Securities, Available-for-sale

The following table summarizes the Company’s marketable securities by significant investment categories (in thousands):

	September 30, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Loss		Fair Value
Commercial paper	$	47,355	$	—	$	—	$	47,355
Total	$	47,355	$	—	$	—	$	47,355
	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Loss		Fair Value
Commercial paper	$	10,794	$	—	$	—	$	10,794
U.S. Treasury and government debt securities	$	8,998	$	1	$	—	$	8,999
Total	$	19,792	$	1	$	—	$	19,793

Property, Plant and Equipment

Property, equipment and software, net consists of the following (in thousands):

	September 30, 2021		December 31, 2020
Internal-use software	$	31,674	$	24,513
Network hardware, computer equipment and software	91,615		62,764
Leasehold improvements	2,098		1,249
Furniture and fixtures	620		621
Property, equipment and software, gross	126,007		89,147
Less: accumulated depreciation and amortization	(74,080)		(59,103)
Total property, equipment and software, net	$	51,927	$	30,044

Schedule of Accounts Payable and Accrued Liabilities

Accounts payable consists of the following (in thousands):

	September 30, 2021		December 31, 2020
Payable to publishers	$	185,530	$	168,673
Other	9,802		8,058
Total accounts payable	$	195,332	$	176,731

Schedule of Accrued Liabilities

Accrued expenses consist of the following (in thousands):

	September 30, 2021		December 31, 2020
Accrued compensation	$	13,205	$	13,352
Accrued and other current liabilities	4,456		1,492
Total accrued expenses	$	17,661	$	14,844