Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Total
Beginning balance at Dec. 31, 2020	$ 191	$ 302,842	$ (277,540)	$ 25,493
Beginning balance, shares at Dec. 31, 2020	19,114
Share-based awards and options exercises	$ 17	2,418		2,435
Share-based awards and options exercises (in shares)	1,715
Issuance of common stock, net of issuance costs of $401	$ 56	80,515		80,571
Issuance of common stock (in shares)	5,566
Share-based compensation expense		7,869		7,869
Net Income (Loss)			(31,193)	(31,193)
Ending balance at Dec. 31, 2021	$ 264	393,644	(308,733)	85,175
Ending balance, shares at Dec. 31, 2021	26,395
Share-based awards and options exercises	$ 9	289		298
Share-based awards and options exercises (in shares)	873
Share-based compensation expense		8,746		8,746
Net Income (Loss)			(37,159)	(37,159)
Ending balance at Dec. 31, 2022	$ 273	402,679	(345,892)	57,060
Ending balance, shares at Dec. 31, 2022	27,268
Share-based awards and options exercises	$ 18	(18)
Share-based awards and options exercises (in shares)	1,824
Share-based compensation expense		7,319		7,319
Net Income (Loss)			(30,189)	(30,189)
Ending balance at Dec. 31, 2023	$ 291	$ 409,980	$ (376,081)	$ 34,190
Ending balance, shares at Dec. 31, 2023	29,092