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	(32,422)				(32,422)
Issuance of common stock (in shares)		2,050,000
Issuance of common stock	64,269	$ 2	64,267
Foreign currency translation gain (loss)	(27)			(27)
Stock-based compensation expense, excluding accrued compensation	35,006		35,006
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 Jun. 30, 2021		66,635,000
Ending balance at Jun. 30, 2021	165,785	$ 105	341,928	17	(176,265)
Beginning balance (in shares) at Mar. 31, 2021		64,625,000
Beginning balance at Mar. 31, 2021	125,964	$ 103	284,470	12	(158,621)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(17,644)				(17,644)
Issuance of common stock (in shares)		2,050,000
Issuance of common stock	64,269	$ 2	64,267
Foreign currency translation gain (loss)	5			5
Stock-based compensation expense, excluding accrued compensation	21,336		21,336
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 Jun. 30, 2021		66,635,000
Ending balance at Jun. 30, 2021	$ 165,785	$ 105	341,928	17	(176,265)
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	(27,272)				(27,272)
Foreign currency translation gain (loss)	18			18
Stock-based compensation expense, excluding accrued compensation	27,200		27,200
Repurchase of common stock (in shares)		(360,000)
Repurchase of common stock	(3,002)		(3,002)
RSUs vested, net of shares withheld to cover tax withholding (in shares)		1,187,000
RSUs vested, net of shares withheld to cover tax withholding	$ (2,886)	$ 1	(2,887)
Ending balance (in shares) at Jun. 30, 2022	67,594,301	67,594,000
Ending balance at Jun. 30, 2022	$ 174,312	$ 106	388,464	(9)	(214,249)
Beginning balance (in shares) at Mar. 31, 2022		67,867,000
Beginning balance at Mar. 31, 2022	175,061	$ 106	376,913	2	(201,960)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(12,289)				(12,289)
Foreign currency translation gain (loss)	(11)			(11)
Stock-based compensation expense, excluding accrued compensation	14,553		14,553
Repurchase of common stock (in shares)		(360,000)
Repurchase of common stock	$ (3,002)		(3,002)
RSUs vested, net of shares withheld to cover tax withholding (in shares)		87,000
Ending balance (in shares) at Jun. 30, 2022	67,594,301	67,594,000
Ending balance at Jun. 30, 2022	$ 174,312	$ 106	$ 388,464	$ (9)	$ (214,249)