Condensed Consolidated Statements of Shareholders' 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		71,000		71,000
Exercise of stock options (in shares)	21,775
Share-based compensation		1,442,000		1,442,000
Net loss			(17,989,000)	(17,989,000)
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
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
Issuance cost in connection with sale of common stock		(32,000)		(32,000)
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)	(123)
Exercise of stock options		71,000		71,000
Exercise of stock options (in shares)	21,775
Share-based compensation		949,000		949,000
Net loss			(9,215,000)	(9,215,000)
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
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, shares	(3,699)
Forfeiture of restricted stock awards		(18,000)		(18,000)
Forfeiture of restricted stock awards (in shares)	(13,701)
Share-based compensation		1,118,000		1,118,000
Net loss			(18,037,000)	(18,037,000)
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
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
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)	(3,699)
Share-based compensation		261,000		261,000
Net loss			(3,547,000)	(3,547,000)
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