CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Dec. 31, 2021	$ 32,605	$ 3	$ 171,597	$ (138,966)		$ (29)
Beginning Balance (shares) at Dec. 31, 2021		27,624,197			105,144
Stock-based compensation	1,316		1,316
Net loss	(8,470)			(8,470)
Unrealized loss on marketable securities	(33)					(33)
Ending Balance at Mar. 31, 2022	25,418	$ 3	172,913	(147,436)		$ (62)
Ending Balance (shares) at Mar. 31, 2022		27,624,197			105,144
Beginning Balance at Dec. 31, 2022	40,033	$ 4	203,482	(163,453)
Beginning Balance (shares) at Dec. 31, 2022		41,199,197			105,144
Stock-based compensation	1,094		1,094
Issuance of common stock and pre-funded warrants, for the purchase of common stock, net of issuance costs	30,301		30,301
Issuance of common stock and pre-funded warrants, for the purchase of common stock, net of issuance costs, Shares		750,000
Exercise of stock options	$ 7		7
Exercise of stock options (shares)	0	8,000
Net loss	$ (6,589)			(6,589)
Unrealized loss on marketable securities	0
Ending Balance at Mar. 31, 2023	$ 64,846	$ 4	$ 234,884	$ (170,042)
Ending Balance (shares) at Mar. 31, 2023		41,957,197			105,144