CONSOLIDATED STATEMENTS OF STOCKHOLDERS' (DEFICIT) EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Private Placement	Public Offering	Cumulative Effect, Period of Adoption, Adjustment	Additional paid-in capital	Additional paid-in capital Private Placement	Additional paid-in capital Public Offering	Shareholder note receivable	Treasury stock	Accumulated other comprehensive income (loss)	Accumulated deficit	Accumulated deficit Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Common Stock Private Placement	Common Stock Public Offering
Balance at Dec. 31, 2019	$ 43,631			$ (81)	$ 606,558			$ (5,000)	$ (97)	$ 1,088	$ (558,924)	$ (81)	$ 6
Balance, shares at Dec. 31, 2019													61,400
Accounting Standards Update Description	ASU 2019-08
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 15,730				15,730
Sales agent equity incentives	521				521
Common stock issued for conversion of Series A preferred stock, shares													39
Common stock issued for warrant exercises	2,368				2,368
Common stock issued for warrant exercises, shares													1,907
Common stock issued for employee stock purchase plan and stock option exercises	1,970				1,970
Common stock issued for employee stock purchase plan and stock option exercises, shares													665
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability	(983)				(983)
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability, shares													2,238
Issuance of common stock warrants, net	2,974				2,974
Issuance of common stock, net of offering costs			$ 107,698				$ 107,696								$ 2
Issuance of common stock, net of offering costs, shares															13,143
Shareholder note receivable	1,000							1,000
Issuance of common stock for other services	123				123
Issuance of common stock for other services, shares													12
Issuance of common stock for prepayment of debt	33,807				33,807
Issuance of common stock for prepayment of debt, shares													2,700
Foreign currency translation adjustments	116									116
Net loss	(78,994)										(78,994)
Balance at Dec. 31, 2020	129,880				770,764			(4,000)	(97)	1,204	(637,999)		$ 8
Balance, shares at Dec. 31, 2020													82,104
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	34,728				34,728
Sales agent equity incentives	1,339				1,339
Sales agent equity incentives, shares													164
Common stock issued for warrant exercises	3,254				3,254
Common stock issued for warrant exercises, shares													3,943
Common stock issued for employee stock purchase plan and stock option exercises	3,584				3,584
Common stock issued for employee stock purchase plan and stock option exercises, shares													796
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability	(12,801)				(12,801)
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability, shares													1,915
Issuance of common stock, net of offering costs		$ 131,828				$ 131,826								$ 2
Issuance of common stock, net of offering costs, shares														12,421
Shareholder note receivable	4,000							$ 4,000
Repurchase of common stock	(25,000)								(25,000)
Repurchase of common stock, shares													(1,806)
Purchase of capped calls	(39,866)				(39,866)
Foreign currency translation adjustments	(7,198)									(7,198)
Net loss	(144,326)										(144,326)
Balance at Dec. 31, 2021	79,422				892,828				(25,097)	(5,994)	(782,325)		$ 10
Balance, shares at Dec. 31, 2021													99,537
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	37,591				37,591
Sales agent equity incentives	3,068				3,068
Sales agent equity incentives, shares													221
Common stock issued for conversion of Series A preferred stock, shares													29
Common stock issued for warrant exercises	4,160				4,159								$ 1
Common stock issued for warrant exercises, shares													3,820
Common stock issued for employee stock purchase plan and stock option exercises	4,020				4,020
Common stock issued for employee stock purchase plan and stock option exercises, shares													806
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability	(11,220)				(11,220)
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability, shares													2,204
Reclassification of liability-classified awards	2,841				2,841
Common stock issued for asset acquisition	250				250
Common stock issued for asset acquisition, shares													23
Foreign currency translation adjustments	(4,696)									(4,696)
Net loss	(152,149)										(152,149)
Balance at Dec. 31, 2022	$ (36,713)				$ 933,537				$ (25,097)	$ (10,690)	$ (934,474)		$ 11
Balance, shares at Dec. 31, 2022													106,640