Condensed Statements of Stockholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Preferred Stock [Member] Private Placement [Member]	Preferred Stock [Member] Series A-1 Preferred Stock [Member]	Preferred Stock [Member]	Common Stock [Member] Private Placement [Member]	Common Stock [Member]	Additional Paid-in Capital [Member] Private Placement [Member]	Additional Paid-in Capital [Member] Series A-1 Preferred Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member] Private Placement [Member]	Retained Earnings [Member] Series A-1 Preferred Stock [Member]	Retained Earnings [Member]	Private Placement [Member]	Series A-1 Preferred Stock [Member]	Total
Balance (in shares) at Dec. 31, 2022			60,961		522,177
Balance at Dec. 31, 2022					$ 8			$ 406,514			$ (402,376)			$ 4,146
Issuance of common stock in public offerings, net of commissions and issuance costs (in shares)			0		794
Issuance of common stock in public offerings, net of commissions and issuance costs			$ 0		$ 0			(21)			0			(21)
Exercise of pre-funded warrants for common stock (in shares)			0		49,858
Exercise of pre-funded warrants for common stock			$ 0		$ 1			(1)			0			0
Issuance of common stock upon vesting of restricted stock units (in shares)			0		2,294
Issuance of common stock upon vesting of restricted stock units					$ 0			0			0			0
Employee stock-based compensation			$ 0		0			245			0			245
Accretion of Series A preferred stock dividends			0		0			(1,218)			0			(1,218)
Net and comprehensive loss			$ 0		$ 0			0			(4,644)			(4,644)
Balance (in shares) at Mar. 31, 2023			60,961		575,123
Balance at Mar. 31, 2023					$ 9			405,519			(407,020)			(1,492)
Balance (in shares) at Dec. 31, 2023			62,881		1,279,928
Balance at Dec. 31, 2023			$ 0		$ 1			414,493			(420,696)			(6,202)
Issuance of common stock in public offerings, net of commissions and issuance costs (in shares)	7,224	10,000		75,327
Issuance of common stock in public offerings, net of commissions and issuance costs		$ 0		$ 0		$ 6,880	$ 0		$ 0	$ 0		$ 6,880	$ 0
Employee stock-based compensation					0			1,096			0			1,096
Accretion of Series A preferred stock dividends			0		0			(65)			0			(65)
Net and comprehensive loss					0			0			(5,517)			(5,517)
Issuance of common stock warrants in connection with the Private Placement			$ 0		$ 0			127			0			127
Cancellation of Series A preferred stock (in shares)			(60,876)		0
Cancellation of Series A preferred stock			$ 0		$ 0			0			0			0
Issuance of common stock upon vesting of restricted stock awards (in shares)			0		368,503
Issuance of common stock upon vesting of restricted stock awards			$ 0		$ 1			0			0			1
Net share settlement of restricted stock awards in satisfaction of tax obligations (in shares)			0		(137,324)
Net share settlement of restricted stock awards in satisfaction of tax obligations			$ 0		$ 0			(374)			0			(374)
Balance (in shares) at Mar. 31, 2024			19,229		1,586,434
Balance at Mar. 31, 2024					$ 2			$ 422,157			$ (426,213)			$ (4,054)