Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Preferred Stock [Member]	Additional Paid-in [Member]	Treasury Stock [Member]	Accumulated Deficit [Member]	Total
Beginning Balance at Dec. 31, 2016			$ 147,331	$ (264)	$ (141,749)	$ 5,318
Beginning Balance (in shares) at Dec. 31, 2016	4,943,929	5,559		12
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance common stock in equity raise, net of offering cost			2,095			2,095
Issuance common stock in equity raise, net of offering cost (in shares)	1,250,000
Repurchase of restricted stock units to pay for employee withholding taxes			(24)			(24)
Repurchase of restricted stock units to pay for employee withholding taxes (in shares)	35,969
Stock-based compensation			23			23
Stock-based compensation (in shares)	5,000
Net income (loss)					(3,306)	(3,306)
Ending Balance at Dec. 31, 2017			149,425	$ (264)	(145,055)	4,106
Ending Balance (in shares) at Dec. 31, 2017	6,234,898	5,559		12
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance common stock in equity raise, net of offering cost	$ 1		2,699			2,700
Issuance common stock in equity raise, net of offering cost (in shares)	2,222,222
Stock-based compensation			320			320
Stock-based compensation (in shares)	85,410
Cumulative effect of the changes related to adoption of ASC 606					3,245	3,245
Net income (loss)					1,727	1,727
Ending Balance at Dec. 31, 2018	$ 1		$ 152,444	$ (264)	$ (140,083)	$ 12,098
Ending Balance (in shares) at Dec. 31, 2018	8,542,530	5,559		12