Condensed Consolidated Statements of Shareholders' (Deficit) Equity - USD ($)	Common Stock	Additional Paid-in Capital	Accumulated Deficit	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	44,301,000		44,391,000
Sale of common stock, net of issuance costs (in shares)	9,000,000
Return of restricted stock awards for tax withholdings		(21,000)		(21,000)
Return of restricted stock awards for tax withholdings, shares	(5,511)
Forfeiture of restricted stock awards (in shares)	(369)
Exercise of stock options		54,000		54,000
Exercise of stock options (in shares)	16,512
Issuance of inducement stock awards		71,000		71,000
Issuance of inducement stock awards (in shares)	21,775
Share-based compensation expense		2,288,000		2,288,000
Net loss			(26,603,000)	(26,603,000)
Balances at Sep. 30, 2022	$ 361,000	274,676,000	(229,460,000)	45,577,000
Balances (in shares) at Sep. 30, 2022	36,144,706
Balances at Jun. 30, 2022	$ 361,000	273,776,000	(220,846,000)	53,291,000
Balances (in shares) at Jun. 30, 2022	36,128,194
Exercise of stock options		54,000		54,000
Exercise of stock options (in shares)	16,512
Share-based compensation expense		846,000		846,000
Net loss			(8,614,000)	(8,614,000)
Balances at Sep. 30, 2022	$ 361,000	274,676,000	(229,460,000)	45,577,000
Balances (in shares) at Sep. 30, 2022	36,144,706
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
Return of restricted stock awards for tax withholdings		(18,000)		(18,000)
Return of restricted stock awards for tax withholdings, shares	(13,701)
Forfeiture of restricted stock awards (in shares)	(9,914)
Exercise of stock options		5,000		$ 5,000
Exercise of stock options (in shares)	1,500			1,500
Share-based compensation expense		745,000		$ 745,000
Net loss			(49,198,000)	(49,198,000)
Balances at Sep. 30, 2023	$ 361,000	276,225,000	(288,972,000)	(12,386,000)
Balances (in shares) at Sep. 30, 2023	36,122,591
Balances at Jun. 30, 2023	$ 361,000	276,593,000	(257,811,000)	19,143,000
Balances (in shares) at Jun. 30, 2023	36,127,306
Forfeiture of restricted stock awards (in shares)	(6,215)
Exercise of stock options		5,000		5,000
Exercise of stock options (in shares)	1,500
Share-based compensation expense		(373,000)		(373,000)
Net loss			(31,161,000)	(31,161,000)
Balances at Sep. 30, 2023	$ 361,000	$ 276,225,000	$ (288,972,000)	$ (12,386,000)
Balances (in shares) at Sep. 30, 2023	36,122,591