Consolidated Balance Sheet Components

12 Months Ended

Dec. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

5. CONSOLIDATED BALANCE SHEET COMPONENTS

Property, Equipment and Software, net —Property, equipment and software, net as of December 31, 2020 and 2021, consisted of the following:


	Estimated Useful Lives	December 31, 2020			December 31, 2021
Internal-use software	2 years	$	21,582		$	35,508
Computer equipment and software	2 years		2,928			4,163
Leasehold improvements	Shorter of useful life or remaining lease term		7,057			7,119
Furniture and fixtures	5 years		2,973			3,051
Total property, equipment and software			34,540			49,841
Less accumulated depreciation and amortization			(15,896	)		(25,116	)
Property, equipment and software—net		$	18,644		$	24,725

Depreciation and amortization expense related to property, equipment and software for the years ended December 31, 2019, 2020 and 2021 was $4,740, $8,114 and $12,513, respectively, which included amortization expense of internal-use software of $3,273, $5,875 and $9,675 respectively, that is recorded within cost of revenue in the consolidated statements of operations.

Intangible Assets, net —Intangible assets, net as of December 31, 2020 and 2021 consisted of the following:


		December 31, 2020							December 31, 2021
	Estimated Useful Lives	Gross Carrying Value		Accumulated Amortization			Net Carrying Value		Gross Carrying Value		Accumulated Amortization			Net Carrying Value
Assembled workforce	3 years	$	181	$	(83	)	$	98	$	181	$	(143	)	$	38
Developed technology	6 years		8,446		(1,930	)		6,516		8,446		(3,337	)		5,109
Content assets	5 years		3,956		—			3,956		5,721		(777	)		4,944
Intangible assets		$	12,583	$	(2,013	)	$	10,570	$	14,348	$	(4,257	)	$	10,091

During the years ended December 31, 2019, 2020 and 2021, the Company capitalized zero, $3,956 and $1,765 of content assets, respectively. Intangible assets amortization expense was $542, $1,471 and $2,244 for the years ended December 31, 2019, 2020 and 2021, respectively.

As of December 31, 2021, the weighted-average remaining amortization period was 0.6 years for assembled workforce, 3.6 years for developed technology and 4.3 years for content assets. Amortization of assembled workforce is included in research and development expenses and amortization of developed technology and content assets is included in cost of revenue in the consolidated statements of operations.

As of December 31, 2021, future expected amortization expense for intangible assets was as follows:


Years Ending December 31
2022	$	2,586
2023		2,551
2024		2,558
2025		2,030
2026		364
2027		2
Total	$	10,091