Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Director [Member] Preferred Stock [Member]	Director [Member] Common Stock [Member]	Director [Member] Additional Paid-in Capital [Member]	Director [Member] Retained Earnings [Member]	Director [Member]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2020						0	41,782
Balance at Dec. 31, 2020						$ 0	$ 418	$ 147,963	$ (136,063)	$ 12,318
Net loss									(1,518)	(1,518)
Stock-based compensation expense related to employee and director stock options								130		130
Stock-based compensation expense related to non-employee stock options								53		53
Balance (in shares) at Mar. 31, 2021						0	41,782
Balance at Mar. 31, 2021							$ 418	148,146	(137,581)	10,983
Balance (in shares) at Dec. 31, 2020						0	41,782
Balance at Dec. 31, 2020						$ 0	$ 418	147,963	(136,063)	12,318
Net loss										(5,666)
Conversion of Series B Preferred Stock to common stock										0
Conversion of Series B Preferred Stock to common stock										0
Conversion of Series B Preferred Stock to common stock										0
Balance (in shares) at Sep. 30, 2021						0	44,943
Balance at Sep. 30, 2021						$ 0	$ 450	150,643	(141,729)	9,364
Balance (in shares) at Mar. 31, 2021						0	41,782
Balance at Mar. 31, 2021							$ 418	148,146	(137,581)	10,983
Net loss									(1,859)	(1,859)
Stock-based compensation expense related to employee and director stock options								242		242
Vesting of director restricted stock awards (in shares)							160
Vesting of director restricted stock awards							$ 2	(2)
Stock-based compensation expense related to non-employee stock options								54		54
Issuance of warrants								13		13
Issuance of common stock, net of offering costs (in shares)							2,673
Issuance of common stock, net of offering costs							$ 27	1,749		1,776
Balance (in shares) at Jun. 30, 2021						0	44,615
Balance at Jun. 30, 2021							$ 447	150,202	(139,440)	11,209
Net loss						$ 0	0	0	(2,289)	(2,289)
Stock-based compensation expense related to employee and director stock options						$ 0	$ 0	151	0	151
Vesting of director restricted stock awards (in shares)						0	328
Vesting of director restricted stock awards						$ 0	$ 3	217	0	220
Stock-based compensation expense related to non-employee stock options						$ 0	$ 0	73	0	73
Balance (in shares) at Sep. 30, 2021						0	44,943
Balance at Sep. 30, 2021						$ 0	$ 450	150,643	(141,729)	9,364
Balance (in shares) at Dec. 31, 2021						14	47,766
Balance at Dec. 31, 2021						$ 680	$ 478	150,900	(141,887)	10,171
Net loss						$ 0	$ 0	0	(111)	(111)
Reclassification of Private Placement Warrants								7,502		7,502
Conversion of Series B Preferred Stock to common stock (in shares)						(1)	(3,653)
Conversion of Series B Preferred Stock to common stock						$ (71)	$ (36)	(35)
Conversion of Series B Preferred Stock to common stock (in shares)						1	3,653
Conversion of Series B Preferred Stock to common stock						$ 71	$ 36	35
Stock-based compensation expense related to employee and director stock options								184		184
Conversion of Series B Preferred Stock to common stock						$ 71	$ 36	35
Balance (in shares) at Mar. 31, 2022						13	51,419
Balance at Mar. 31, 2022						$ 609	$ 514	158,621	(141,998)	17,746
Balance (in shares) at Dec. 31, 2021						14	47,766
Balance at Dec. 31, 2021						$ 680	$ 478	150,900	(141,887)	10,171
Net loss										(2,402)
Conversion of Series B Preferred Stock to common stock										(110)
Conversion of Series B Preferred Stock to common stock										110
Conversion of Series B Preferred Stock to common stock										110
Balance (in shares) at Sep. 30, 2022						12	64,988
Balance at Sep. 30, 2022						$ 570	$ 650	162,510	(149,946)	13,784
Balance (in shares) at Mar. 31, 2022						13	51,419
Balance at Mar. 31, 2022						$ 609	$ 514	158,621	(141,998)	17,746
Net loss									(2,155)	(2,155)
Conversion of Series B Preferred Stock to common stock (in shares)						1	(1,974)
Conversion of Series B Preferred Stock to common stock						$ 39	$ (20)	(19)		0
Conversion of Series B Preferred Stock to common stock (in shares)						(1)	1,974
Conversion of Series B Preferred Stock to common stock						$ (39)	$ 20	19		0
Stock-based compensation expense related to employee and director stock options						0	0	154	0	154
Conversion of Series B Preferred Stock to common stock						$ (39)	$ 20	19		0
Vesting of director restricted stock awards (in shares)	0	120
Vesting of director restricted stock awards	$ 0	$ 1	$ (1)	$ 0	$ 0
Balance (in shares) at Jun. 30, 2022						12	53,513
Balance at Jun. 30, 2022						$ 570	$ 535	158,793	(144,153)	15,745
Net loss						0	0	0	(136)	(136)
Stock-based compensation expense related to employee and director stock options						0	0	(208)	0	(208)
Modification of common stock warrants						$ 0	$ 0	1,922	0	1,922
Exercise of warrants, net of offering costs (in shares)						0	11,475
Exercise of warrants, net of offering costs						$ 0	$ 115	171	0	286
Reclassification of common stock warrants to liability						0	0	(3,825)	0	(3,825)
Adjustment of Series B Preferred Stock conversion price						$ 0	$ 0	5,657	(5,657)	0
Balance (in shares) at Sep. 30, 2022						12	64,988
Balance at Sep. 30, 2022						$ 570	$ 650	$ 162,510	$ (149,946)	$ 13,784