Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member] ATM [Member]	Common Stock [Member] Restricted Stock Units (RSUs) [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 at December 31, 2021 (in shares) at Dec. 31, 2021			16,871,265
Balance at December 31, 2021 at Dec. 31, 2021			$ 17		$ 139,055		$ (128,697)		$ 10,375
Share-based compensation					319				319
Net loss							(3,325)		(3,325)
Balance at March 31, 2022 (in shares) at Mar. 31, 2022			16,871,265
Balance at March 31, 2022 at Mar. 31, 2022			$ 17		139,374		(132,022)		7,369
Balance at December 31, 2021 (in shares) at Dec. 31, 2021			16,871,265
Balance at December 31, 2021 at Dec. 31, 2021			$ 17		139,055		(128,697)		10,375
Balance at March 31, 2022 (in shares) at Dec. 31, 2022			20,076,773
Balance at March 31, 2022 at Dec. 31, 2022			$ 20		145,476		(140,604)		4,892
Share-based compensation			0		278		0		278
Net loss			$ 0		0		(3,501)		$ (3,501)
Sale of common stock under ATM, net of issuance costs of $13 (in shares)	106,241
Sale of common stock under ATM, net of issuance costs of $13	$ 0			$ 231		$ 0		$ 231
Exercise of common stock options (in shares)			199						14,059
Exercise of common stock options					0				$ 0
Restricted stock units vested and issued (in shares)		18,792
Balance at March 31, 2022 (in shares) at Mar. 31, 2023			20,202,005
Balance at March 31, 2022 at Mar. 31, 2023			$ 20		$ 145,985		$ (144,105)		$ 1,900