Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member] ATM [Member]	Common Stock [Member]	Additional Paid-in Capital [Member] ATM [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member] ATM [Member]	Retained Earnings [Member]	ATM [Member]	Total
Balance (in shares) at Dec. 31, 2022		20,076,773
Balance at Dec. 31, 2022		$ 20		$ 145,476		$ (140,604)		$ 4,892
Sale of common stock, net of issuance costs (in shares)	106,241
Sale of common stock, net of issuance costs	$ 0		$ 231		$ 0		$ 231
Exercise of common stock options (in shares)		199
Exercise of common stock options				0				0
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)		18,792
Share-based compensation				278				278
Net loss						(3,501)	(3,501)	(3,501)
Share-based compensation				278				278
Balance (in shares) at Mar. 31, 2023		20,202,005
Balance at Mar. 31, 2023		$ 20		145,985		(144,105)		1,900
Balance (in shares) at Dec. 31, 2023		23,666,534
Balance at Dec. 31, 2023		$ 24		150,548		(152,175)		(1,603)
Sale of common stock, net of issuance costs (in shares)	1,156,877	2,012,978
Sale of common stock, net of issuance costs	$ 1	$ 2	$ 558	830	$ 0	0	559	832
Share-based compensation		0		204		0		204
Net loss		0		0		(2,267)	$ (2,267)	(2,267)
Share-based compensation		$ 0		204		0		204
Balance (in shares) at Mar. 31, 2024		26,836,389
Balance at Mar. 31, 2024		$ 27		$ 152,140		$ (154,442)		$ (2,275)