CONDENSED CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Common stock	Additional paid in capital	Accumulated deficit	Notes receivable - shareholder's	Accumulated comprehensive income (loss)	Series A redeemable convertible preferred stock	Series B redeemable convertible preferred stock	Series B-1 redeemable convertible preferred stock	Series B-2 redeemable convertible preferred stock
Beginning balance, redeemable convertible preferred stock (in shares) at Dec. 31, 2020							16,620,000	14,213,000	5,416,000	18,199,000
Beginning balance, redeemable convertible preferred stock at Dec. 31, 2020							$ 14,970	$ 27,371	$ 14,786	$ 52,379
Ending balance, redeemable convertible preferred stock (in shares) at Mar. 31, 2021							16,620,000	14,213,000	5,416,000	18,199,000
Ending balance, redeemable convertible preferred stock at Mar. 31, 2021							$ 14,970	$ 27,371	$ 14,786	$ 52,379
Beginning balance, common stock (in shares) at Dec. 31, 2020		16,774,000
Beginning balance, common stock at Dec. 31, 2020	$ (72,424)	$ 2	$ 3,557	$ (75,982)	$ 0	$ (1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock option and stock awards plans (in shares)		5,843,000
Issuance of common stock under employee stock option and stock award plans	223	$ 1	1,405		(1,183)
Stock-based compensation expense related to employee and non-employee stock awards	1,835		1,835
Foreign currency translation adjustment	(1)					(1)
NET INCOME (LOSS)	(7,345)			(7,345)
Ending balance, common stock (in shares) at Mar. 31, 2021		22,617,000
Ending balance, common stock at Mar. 31, 2021	$ (77,712)	$ 3	6,797	(83,327)	(1,183)	(2)
Beginning balance, redeemable convertible preferred stock (in shares) at Dec. 31, 2021							0	0	0	0
Beginning balance, redeemable convertible preferred stock at Dec. 31, 2021							$ 0	$ 0	$ 0	$ 0
Ending balance, redeemable convertible preferred stock (in shares) at Mar. 31, 2022							0	0	0	0
Ending balance, redeemable convertible preferred stock at Mar. 31, 2022							$ 0	$ 0	$ 0	$ 0
Beginning balance, common stock (in shares) at Dec. 31, 2021	117,750,608	117,751,000
Beginning balance, common stock at Dec. 31, 2021	$ 65,536	$ 15	294,190	(228,667)	0	(2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock option and stock awards plans (in shares)		2,459,000
Issuance of common stock under employee stock option and stock award plans	1,305		1,305
Repurchase of common stock (in shares)		(67,000)
Repurchase of common stock	(550)		(550)
Exercise of warrants (in shares)		3,318,000
Exercise of warrants	29,641		29,641
Stock-based compensation expense related to employee and non-employee stock awards	24,072		24,072
Foreign currency translation adjustment	(60)					(60)
NET INCOME (LOSS)	$ 79,792			79,792
Ending balance, common stock (in shares) at Mar. 31, 2022	123,461,312	123,461,000
Ending balance, common stock at Mar. 31, 2022	$ 199,736	$ 15	$ 348,658	$ (148,875)	$ 0	$ (62)