Statements of Changes in Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Preferred Stock Series A Convertible Preferred Stock	Preferred Stock Series B Convertible Preferred Stock	Preferred Stock Series A and B Convertible Preferred Stock	Common stock Public offering	Common stock At-the-market sales	Common stock Series A Convertible Preferred Stock	Common stock Series B Convertible Preferred Stock	Common stock	Additional Paid-in Capital. Public offering	Additional Paid-in Capital. At-the-market sales	Additional Paid-in Capital.	Accumulated Other Comprehensive Income	Accumulated Deficit	Public offering	At-the-market sales	Total
Balance at Dec. 31, 2020											$ 361,548	$ 3	$ (312,223)			$ 49,328
Balance (in shares) at Dec. 31, 2020								43,782
Increase (decrease) in stockholders' equity
Share-based compensation - stock options and RSUs											3,338					3,338
Issuance of common stock									$ 11,898	$ 9,266				$ 11,898	$ 9,266
Issuance of common stock (in shares)				13,333	3,458
Issuance of common stock upon exercise of options											75					75
Issuance of common stock upon exercise of options (in shares)								63
Vesting of RSUs (in shares)								62
Warrants issued in connection with long-term debt											1,080					1,080
Unrealized net gain on marketable securities												$ (3)				(3)
Net Income (Loss)													(71,067)			(71,067)
Balance at Dec. 31, 2021											387,205		(383,290)			3,915
Balance (in shares) at Dec. 31, 2021								60,698
Increase (decrease) in stockholders' equity
Share-based compensation - stock options and RSUs											2,492					2,492
Issuance of common stock				$ 3	$ 1					13,456				$ 3	13,457
Issuance of common stock (in shares)				533,333	253,115
Conversion of convertible preferred stock (in shares)	(2,425)	(2,425)	4,850			6,063	6,063
Vesting of RSUs (in shares)								130
Net Income (Loss)													(25,412)			(25,412)
Balance at Dec. 31, 2022								$ 4			403,153		(408,702)			(5,545)
Balance (in shares) at Dec. 31, 2022								859,402
Increase (decrease) in stockholders' equity
Share-based compensation - stock options and RSUs											1,981					1,981
Fractional shares retired as a result of reverse split											(13)					(13)
Issuance of common stock										$ 1,725					$ 1,725
Issuance of common stock (in shares)				95,000	207,883
Exercise of pre-funded warrants (in shares)								1,801,286
Vesting of RSUs (in shares)								86
Net Income (Loss)													(14,465)			(14,465)
Balance at Dec. 31, 2023								$ 4			$ 406,846		$ (423,168)			$ (16,318)
Balance (in shares) at Dec. 31, 2023								2,963,657