CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional paid-in capital	Shareholder note receivable	Treasury stock	Accumulated other comprehensive income (loss)	Accumulated deficit	Public Offering	Public Offering Common Stock	Public Offering Additional paid-in capital
Balance at Dec. 31, 2020	$ 129,880	$ 8	$ 770,764	$ (4,000)	$ (97)	$ 1,204	$ (637,999)
Balance, shares at Dec. 31, 2020		82,104
Stock-based compensation	3,889		3,889
Sales agent equity incentives	129		129
Common stock issued for warrant exercises	756		756
Common stock issued for warrant exercises, shares		2,019
Common stock issued for stock option exercises	210		210
Common stock issued for stock option exercises, shares		69
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability	(1,717)		(1,717)
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability, shares		379
Shareholder note receivable	1,100			1,100
Foreign currency translation adjustments	(3,052)					(3,052)
Net loss	(22,903)						(22,903)
Balance at Mar. 31, 2021	108,292	$ 8	774,031	(2,900)	(97)	(1,848)	(660,902)
Balance, shares at Mar. 31, 2021		84,571
Balance at Dec. 31, 2020	129,880	$ 8	770,764	(4,000)	(97)	1,204	(637,999)
Balance, shares at Dec. 31, 2020		82,104
Foreign currency translation adjustments	(1,355)
Net loss	(61,108)
Balance at Jun. 30, 2021	213,514	$ 10	914,659	(1,800)	(97)	(151)	(699,107)
Balance, shares at Jun. 30, 2021		100,049
Balance at Mar. 31, 2021	108,292	$ 8	774,031	(2,900)	(97)	(1,848)	(660,902)
Balance, shares at Mar. 31, 2021		84,571
Stock-based compensation	11,187		11,187
Sales agent equity incentives	94		94
Common stock issued for warrant exercises	1,729		1,729
Common stock issued for warrant exercises, shares		1,576
Common stock issued for employee stock purchase plan and stock option exercises	1,479		1,479
Common stock issued for employee stock purchase plan and stock option exercises, shares		356
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability	(5,687)		(5,687)
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability, shares		1,125
Issuance of common stock, net of offering costs								$ 131,828	$ 2	$ 131,826
Issuance of common stock, net of offering costs, shares									12,421
Shareholder note receivable	1,100			1,100
Foreign currency translation adjustments	1,697					1,697
Net loss	(38,205)						(38,205)
Balance at Jun. 30, 2021	213,514	$ 10	914,659	$ (1,800)	(97)	(151)	(699,107)
Balance, shares at Jun. 30, 2021		100,049
Balance at Dec. 31, 2021	79,422	$ 10	892,828		(25,097)	(5,994)	(782,325)
Balance, shares at Dec. 31, 2021		99,537
Stock-based compensation	7,730		7,730
Sales agent equity incentives	2,178		2,178
Sales agent equity incentives, shares		199
Common stock issued for warrant exercises	1,289		1,289
Common stock issued for warrant exercises, shares		551
Common stock issued for stock option exercises	140		140
Common stock issued for stock option exercises, shares		39
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability	(4,751)		(4,751)
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability, shares		852
Foreign currency translation adjustments	(1,180)					(1,180)
Net loss	(42,844)						(42,844)
Balance at Mar. 31, 2022	41,984	$ 10	899,414		(25,097)	(7,174)	(825,169)
Balance, shares at Mar. 31, 2022		101,178
Balance at Dec. 31, 2021	79,422	$ 10	892,828		(25,097)	(5,994)	(782,325)
Balance, shares at Dec. 31, 2021		99,537
Foreign currency translation adjustments	(6,469)
Net loss	(80,164)
Balance at Jun. 30, 2022	10,539	$ 11	910,577		(25,097)	(12,463)	(862,489)
Balance, shares at Jun. 30, 2022		104,518
Balance at Mar. 31, 2022	41,984	$ 10	899,414		(25,097)	(7,174)	(825,169)
Balance, shares at Mar. 31, 2022		101,178
Stock-based compensation	10,109		10,109
Sales agent equity incentives	361		361
Sales agent equity incentives, shares		20
Common stock issued for conversion of Series A preferred stock		29
Common stock issued for warrant exercises	2,675	$ 1	2,674
Common stock issued for warrant exercises, shares		1,914
Common stock issued for employee stock purchase plan and stock option exercises	2,331		2,331
Common stock issued for employee stock purchase plan and stock option exercises, shares		535
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability	(4,562)		(4,562)
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability, shares		819
Common stock issued for asset acquisition, shares		23
Common stock issued for asset acquisition	250		250
Foreign currency translation adjustments	(5,289)					(5,289)
Net loss	(37,320)						(37,320)
Balance at Jun. 30, 2022	$ 10,539	$ 11	$ 910,577		$ (25,097)	$ (12,463)	$ (862,489)
Balance, shares at Jun. 30, 2022		104,518