STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid In Capital [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2021	$ 58,057	$ 14	$ 900,895	$ (842,852)
Balance (in shares) at Dec. 31, 2021		14,408,496
Stock-based compensation	3,528		3,528
Restricted stock awards (in shares)		18,667
Exercise of employee stock options	$ 21		21
Exercise of employee stock options (in shares)	1,750	1,750
Repurchase of common stock	$ (45)			(45)
Repurchase of common stock (in shares)		(1,250)
Issuance of common stock, net of expenses	14,724	$ 2	14,722
Issuance of common stock, net of expenses (in shares)		1,615,248
Cancelled restricted common stock (in shares)		(15,527)
Net loss	(37,730)			(37,730)
Balance at Dec. 31, 2022	38,555	$ 16	919,166	(880,627)
Balance (in shares) at Dec. 31, 2022		16,027,384
Stock-based compensation	2,800		2,800
Issuance of common stock, net of expenses	92		92
Issuance of common stock, net of expenses (in shares)		14,420
Cancelled restricted common stock (in shares)		(29,282)
Net loss	(35,140)			(35,140)
Balance at Dec. 31, 2023	$ 6,307	$ 16	$ 922,058	$ (915,767)
Balance (in shares) at Dec. 31, 2023		16,012,522