Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income/(Loss)	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2020		64,625,000
Beginning balance at Dec. 31, 2020	$ 127,104	$ 103	$ 270,800	$ 44	$ (143,843)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(37,644)				(37,644)
Issuance of common stock (in shares)		2,050,000
Issuance of common stock	64,269	$ 2	64,267
Foreign currency translation loss	(40)			(40)
Stock-based compensation expense, excluding accrued compensation	47,378		47,378
Repurchase of outstanding warrants	(26,894)		(26,894)
Repurchase of common stock (in shares)		(40,000)
Repurchase of common stock	(1,251)		(1,251)
Ending balance (in shares) at Sep. 30, 2021		66,635,000
Ending balance at Sep. 30, 2021	172,922	$ 105	354,300	4	(181,487)
Beginning balance (in shares) at Jun. 30, 2021		66,635,000
Beginning balance at Jun. 30, 2021	165,785	$ 105	341,928	17	(176,265)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(5,222)				(5,222)
Foreign currency translation loss	(13)			(13)
Stock-based compensation expense, excluding accrued compensation	12,372		12,372
Ending balance (in shares) at Sep. 30, 2021		66,635,000
Ending balance at Sep. 30, 2021	$ 172,922	$ 105	354,300	4	(181,487)
Beginning balance (in shares) at Dec. 31, 2021	66,767,450	66,767,000
Beginning balance at Dec. 31, 2021	$ 180,254	$ 105	367,153	(27)	(186,977)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(34,612)				(34,612)
Foreign currency translation loss	(3)			(3)
Stock-based compensation expense, excluding accrued compensation	42,212		42,212
Repurchase of common stock (in shares)		(859,000)
Repurchase of common stock	(7,683)		(7,683)
RSUs vested, net of shares withheld to cover tax withholding (in shares)		1,392,000
RSUs vested, net of shares withheld to cover tax withholding	$ (3,135)	$ 1	(3,136)
Ending balance (in shares) at Sep. 30, 2022	67,300,099	67,300,000
Ending balance at Sep. 30, 2022	$ 177,033	$ 106	398,546	(30)	(221,589)
Beginning balance (in shares) at Jun. 30, 2022		67,594,000
Beginning balance at Jun. 30, 2022	174,312	$ 106	388,464	(9)	(214,249)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(7,340)				(7,340)
Foreign currency translation loss	(21)			(21)
Stock-based compensation expense, excluding accrued compensation	15,012		15,012
Repurchase of common stock (in shares)		(499,000)
Repurchase of common stock	(4,681)		(4,681)
RSUs vested, net of shares withheld to cover tax withholding (in shares)		205,000
RSUs vested, net of shares withheld to cover tax withholding	$ (249)		(249)
Ending balance (in shares) at Sep. 30, 2022	67,300,099	67,300,000
Ending balance at Sep. 30, 2022	$ 177,033	$ 106	$ 398,546	$ (30)	$ (221,589)