CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2022		67,431,000
Beginning balance at Dec. 31, 2022	$ 172,354	$ 106	$ 412,708	$ (55)	$ (240,405)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(27,442)				(27,442)
Foreign currency translation gain (loss)	31			31
Actuarial loss on pension liability adjustment	0
Restricted stock unit awards vested, net of shares withheld to cover tax withholding (in shares)		1,415,000
Restricted stock unit awards vested, net of shares withheld to cover tax withholding	(1,675)	$ 1	(1,676)
Stock-based compensation	18,811		18,811
Issuance of common stock for 401K match (in shares)		777,000
Issuance of common stock for 401K match	1,942	$ 1	1,941
Ending balance (in shares) at Sep. 30, 2023		69,623,000
Ending balance at Sep. 30, 2023	164,021	$ 108	431,784	(24)	(267,847)
Beginning balance (in shares) at Jun. 30, 2023		69,467,000
Beginning balance at Jun. 30, 2023	167,536	$ 108	426,656	(53)	(259,175)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(8,672)				(8,672)
Foreign currency translation gain (loss)	29			29
Actuarial loss on pension liability adjustment	0
Restricted stock unit awards vested, net of shares withheld to cover tax withholding (in shares)		156,000
Restricted stock unit awards vested, net of shares withheld to cover tax withholding	(90)		(90)
Stock-based compensation	5,218		5,218
Ending balance (in shares) at Sep. 30, 2023		69,623,000
Ending balance at Sep. 30, 2023	$ 164,021	$ 108	431,784	(24)	(267,847)
Beginning balance (in shares) at Dec. 31, 2023	70,239,890	70,240,000
Beginning balance at Dec. 31, 2023	$ 159,003	$ 109	433,781	(60)	(274,827)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(43,190)				(43,190)
Foreign currency translation gain (loss)	(34)			(34)
Actuarial loss on pension liability adjustment	(30)			(30)
Restricted stock unit awards vested, net of shares withheld to cover tax withholding (in shares)		1,687,000
Restricted stock unit awards vested, net of shares withheld to cover tax withholding	(457)	$ 2	(459)
Stock-based compensation	$ 12,424		12,424
Issuance of common stock upon exercise of stock options (in shares)	83,000	83,000
Issuance of common stock upon exercise of stock options	$ 149		149
Issuance of common stock for 401K match (in shares)		370,000
Issuance of common stock for 401K match	$ 1,618		1,618
Ending balance (in shares) at Sep. 30, 2024	72,380,609	72,380,000
Ending balance at Sep. 30, 2024	$ 129,483	$ 111	447,513	(124)	(318,017)
Beginning balance (in shares) at Jun. 30, 2024		72,223,000
Beginning balance at Jun. 30, 2024	149,149	$ 111	439,146	(146)	(289,962)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(28,055)				(28,055)
Foreign currency translation gain (loss)	22			22
Actuarial loss on pension liability adjustment	0
Restricted stock unit awards vested, net of shares withheld to cover tax withholding (in shares)		132,000
Restricted stock unit awards vested, net of shares withheld to cover tax withholding	(28)		(28)
Stock-based compensation	8,350		8,350
Issuance of common stock upon exercise of stock options (in shares)		25,000
Issuance of common stock upon exercise of stock options	$ 45		45
Ending balance (in shares) at Sep. 30, 2024	72,380,609	72,380,000
Ending balance at Sep. 30, 2024	$ 129,483	$ 111	$ 447,513	$ (124)	$ (318,017)