Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Loss	Retained Earnings	Total
Beginning balance at Dec. 31, 2017	$ 51	$ 5,719	$ (102)	$ (19)	$ 11,556	$ 17,205
Net unrealized holding gain (loss)				(14)		(14)
Proceeds from options exercised		6				6
Vesting of restricted stock		117				117
Net income (loss)					(422)	(422)
Ending balance at Mar. 31, 2018	51	5,842	(102)	(33)	11,134	16,892
Beginning balance at Dec. 31, 2018	51	5,973	(102)	(37)	12,962	18,847
Net unrealized holding gain (loss)				15		15
Proceeds from options exercised						0
Vesting of restricted stock		84				84
Net income (loss)					331	331
Ending balance at Mar. 31, 2019	$ 51	$ 6,057	$ (102)	$ (22)	$ 13,293	$ 19,277