Consolidated Statements of Stockholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balances at Dec. 31, 2021	$ 271,000	$ 227,983,000	$ (202,857,000)	$ 25,397,000
Balances (in shares) at Dec. 31, 2021	27,112,299
Sale of common stock, net of issuance costs	$ 90,000	44,333,000		44,423,000
Sale of common stock, net of issuance costs (in shares)	9,000,000
Forfeiture of restricted stock awards (in shares)	(246)
Share-based compensation		493,000		493,000
Net loss			(8,774,000)	(8,774,000)
Balances at Mar. 31, 2022	$ 361,000	272,809,000	(211,631,000)	61,539,000
Balances (in shares) at Mar. 31, 2022	36,112,053
Balances at Dec. 31, 2022	$ 361,000	275,493,000	(239,774,000)	36,080,000
Balances (in shares) at Dec. 31, 2022	36,144,706
Share-based compensation		857,000		857,000
Net loss			(14,490,000)	(14,490,000)
Balances at Mar. 31, 2023	$ 361,000	$ 276,350,000	$ (254,264,000)	$ 22,447,000
Balances (in shares) at Mar. 31, 2023	36,144,706