Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands	At-the-market Offering [Member] Common Stock Outstanding [Member]	At-the-market Offering [Member] Additional Paid-in Capital [Member]	At-the-market Offering [Member] Retained Earnings [Member]	At-the-market Offering [Member]	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, net of issuance costs					$ 0	392	0	392
Shares issued (in shares)	1,694				6
Shares issued	$ 8	$ 3,293	$ 0	$ 3,301
Shares issued to Cross River Partners, L.P. in subordinated debt and accrued interest conversion (Note 2) (in shares)					404
Shares issued to Cross River Partners, L.P. in subordinated debt and accrued interest conversion (Note 2)					$ 2	1,513	0	1,515
Shares and warrants issued to East West Bank in senior revolving credit facility debt restructuring (Note 2 and Note 5) (in shares)					533
Shares and warrants issued to East West Bank in senior revolving credit facility debt restructuring (Note 2 and Note 5)					$ 3	2,529	0	2,532
Restricted share cancellations (in shares)					(50)
Restricted share cancellations					$ 0	0	0	0
Additional shares issued due to rounding up of fractional shares in connection with reverse stock split (in shares)					11
Net loss					$ 0	0	(2,509)	(2,509)
Restricted share cancellations (in shares)					50
Balance (in shares) at Dec. 31, 2020					6,301
Balance at Dec. 31, 2020					$ 32	30,052	(27,529)	2,555
Stock-based compensation, net of issuance costs					$ 0	130	0	130
Shares issued (in shares)					4,200
Shares issued					$ 21	8,824	0	8,845
Shares issued to Cross River Partners, L.P. in subordinated debt and accrued interest conversion (Note 2) (in shares)					602
Shares issued to Cross River Partners, L.P. in subordinated debt and accrued interest conversion (Note 2)					$ 3	1,550	0	1,553
Restricted share cancellations (in shares)					1
Net loss					$ 0	0	(8,052)	(8,052)
Restricted share issuances (in shares)					330
Restricted share issuances					$ 1	310	0	311
Restricted share cancellations (in shares)					(1)
Balance (in shares) at Dec. 31, 2021					11,432
Balance at Dec. 31, 2021					$ 57	$ 40,866	$ (35,581)	$ 5,342