Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Preferred Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Deficit [Member]	Total
Beginning Balance at Dec. 31, 2017			$ 149,425	$ (264)	$ (145,055)	$ 4,106
Beginning Balance (in shares) at Dec. 31, 2017	1,467,052	5,559		3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance common stock in equity raise, net of offering cost			2,700			2,700
Issuance common stock in equity raise, net of offering cost (in shares)	522,876
Stock-based compensation			188			188
Stock-based compensation (in shares)	14,118
Cumulative effect of the changes related to adoption of ASC 606					3,245	3,245
Net loss					(1,486)	(1,486)
Ending Balance at Mar. 31, 2018			152,313	$ (264)	(143,296)	8,753
Ending Balance (in shares) at Mar. 31, 2018	2,004,046	5,559		3
Beginning Balance at Dec. 31, 2018			152,445	$ (264)	(140,083)	12,098
Beginning Balance (in shares) at Dec. 31, 2018	2,010,025	5,559		3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation			6			6
Net loss					(1,149)	(1,149)
Ending Balance at Mar. 31, 2019			$ 152,451	$ (264)	$ (141,232)	$ 10,955
Ending Balance (in shares) at Mar. 31, 2019	2,010,025	5,559		3