Condensed Consolidated Statements of Stockholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balances at Dec. 31, 2020	$ 187,000	$ 198,372,000	$ (179,702,000)	$ 18,857,000
Balances (in shares) at Dec. 31, 2020	18,688,461
Sale of common stock, net of issuance costs	$ 61,000	19,302,000		19,363,000
Sale of common stock, net of issuance costs (in shares)	6,153,847
Exercise of warrants	$ 1,000	290,000		291,000
Exercise of warrants (in shares)	52,000
Return of restricted stock awards for tax withholdings		(106,000)		(106,000)
Return of restricted stock awards for tax withholdings, shares	(25,424)
Forfeiture of restricted stock awards (in shares)	(1,047)
Exercise of stock options		240,000		240,000
Exercise of stock options (in shares)	73,517
Issuance of inducement stock awards (in shares)	23,732
Stock-based compensation		2,218,000		2,218,000
Net loss			(17,108,000)	(17,108,000)
Balances at Sep. 30, 2021	$ 249,000	220,316,000	(196,810,000)	23,755,000
Balances (in shares) at Sep. 30, 2021	24,965,086
Balances at Jun. 30, 2021	$ 249,000	219,761,000	(191,391,000)	28,619,000
Balances (in shares) at Jun. 30, 2021	24,937,826
Forfeiture of restricted stock awards (in shares)	(123)
Exercise of stock options		86,000		86,000
Exercise of stock options (in shares)	27,383
Stock-based compensation		469,000		469,000
Net loss			(5,419,000)	(5,419,000)
Balances at Sep. 30, 2021	$ 249,000	220,316,000	(196,810,000)	23,755,000
Balances (in shares) at Sep. 30, 2021	24,965,086
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			38,287
Issuance of inducement stock awards		71,000		$ 71,000
Issuance of inducement stock awards (in shares)	21,775
Stock-based compensation		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
Stock-based compensation		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