Consolidated Statements of Stockholders' Equity (Deficit) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock Outstanding [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2019	3,703
Balance at Dec. 31, 2019	$ 19	$ 22,325	$ (25,020)	$ (2,676)
Stock-based compensation	$ 0	39	0	39
Restricted share cancellation (in shares)	(2)
Restricted share cancellation	$ 0	0	0	0
Net loss	$ 0	0	(2,837)	(2,837)
Restricted share cancellation (in shares)	2
Restricted share cancellation	$ (0)	(0)	(0)	(0)
Balance (in shares) at Mar. 31, 2020	3,701
Balance at Mar. 31, 2020	$ 19	22,364	(27,857)	(5,474)
Balance (in shares) at Dec. 31, 2019	3,703
Balance at Dec. 31, 2019	$ 19	22,325	(25,020)	(2,676)
Net loss				(7,194)
Balance (in shares) at Jun. 30, 2020	3,663
Balance at Jun. 30, 2020	$ 19	22,691	(32,214)	(9,504)
Balance (in shares) at Mar. 31, 2020	3,701
Balance at Mar. 31, 2020	$ 19	22,364	(27,857)	(5,474)
Stock-based compensation	$ 0	322	0	322
Restricted share cancellation (in shares)	45
Restricted share cancellation	$ 0	0	0	0
Net loss	$ 0		(4,357)	(4,357)
Restricted share issuance (in shares)	7
Restricted share issuance	$ 0	0	0	0
Restricted share cancellation (in shares)	(45)
Restricted share cancellation	$ 0	0	0	0
Restricted share vested	$ 0	5	0	5
Balance (in shares) at Jun. 30, 2020	3,663
Balance at Jun. 30, 2020	$ 19	22,691	(32,214)	(9,504)
Balance (in shares) at Dec. 31, 2020	6,301
Balance at Dec. 31, 2020	$ 32	30,052	(27,529)	2,555
Stock-based compensation	0	24	0	24
Net loss	$ 0	0	(3,902)	(3,902)
Restricted share issuance (in shares)	330
Restricted share issuance	$ 1	310	0	311
Shares issued in offering, net of issuance costs (in shares)	4,200
Shares issued in offering, net of issuance costs	$ 21	8,824	0	8,845
Shares and warrant issued to Cross River Partners, L.P. in subordinated debt and accrued interest conversion, net of discount (in shares)	602
Shares and warrant issued to Cross River Partners, L.P. in subordinated debt and accrued interest conversion, net of discount	$ 3	1,550	0	1,553
Balance (in shares) at Mar. 31, 2021	11,433
Balance at Mar. 31, 2021	$ 57	40,760	(31,431)	9,386
Balance (in shares) at Dec. 31, 2020	6,301
Balance at Dec. 31, 2020	$ 32	30,052	(27,529)	2,555
Net loss				(5,335)
Balance (in shares) at Jun. 30, 2021	11,433
Balance at Jun. 30, 2021	$ 57	40,785	(32,864)	7,978
Balance (in shares) at Mar. 31, 2021	11,433
Balance at Mar. 31, 2021	$ 57	40,760	(31,431)	9,386
Stock-based compensation	0	25	0	25
Net loss	$ 0	0	(1,433)	(1,433)
Balance (in shares) at Jun. 30, 2021	11,433
Balance at Jun. 30, 2021	$ 57	$ 40,785	$ (32,864)	$ 7,978