Income Taxes - Significant Components of Deferred Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating loss and credit carryforwards	$ 76,475	$ 52,216
Lease liabilities	2,834	3,868
Deferred revenue	358	426
Depreciation and amortization	7,942	8,381
Stock-based compensation	3,367	2,401
Other	7,954	1,721
Gross deferred tax assets	98,930	69,013
Valuation allowance	(92,531)	(62,917)
Deferred tax liabilities:
Foreign DTLs	(429)
Goodwill DTL	(321)
Deferred commission	(1,885)	(1,448)
Right-of-use assets	(2,049)	(2,904)
Prepaid expenses and other	(1,809)	(1,744)
Gross deferred tax liabilities	(6,493)	$ (6,096)
Net deferred tax assets	$ (94)