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					(422)	(422)
Ending balance at Mar. 31, 2018	51	5,842	(102)	(33)	11,134	16,892
Beginning balance at Dec. 31, 2017	51	5,719	(102)	(19)	11,556	17,205
Proceeds from options exercised						12
Vesting of restricted stock						256
Net income						790
Ending balance at Sep. 30, 2018	51	5,986	(102)	(41)	12,346	18,240
Beginning balance at Mar. 31, 2018	51	5,842	(102)	(33)	11,134	16,892
Net unrealized holding gain (loss)				1		1
Proceeds from options exercised		6				6
Vesting of restricted stock		69				69
Net income					692	692
Ending balance at Jun. 30, 2018	51	5,917	(102)	(32)	11,826	17,660
Net unrealized holding gain (loss)				(9)		(9)
Proceeds from options exercised		69				69
Net income					520	520
Ending balance at Sep. 30, 2018	51	5,986	(102)	(41)	12,346	18,240
Beginning balance at Dec. 31, 2018	51	5,973	(102)	(37)	12,962	18,847
Net unrealized holding gain (loss)				15		15
Vesting of restricted stock		84				84
Net income					331	331
Ending balance at Mar. 31, 2019	51	6,057	(102)	(22)	13,293	19,277
Beginning balance at Dec. 31, 2018	51	5,973	(102)	(37)	12,962	18,847
Proceeds from options exercised						0
Vesting of restricted stock						223
Net income						1,178
Ending balance at Sep. 30, 2019	52	6,195	(102)	(8)	14,140	20,277
Beginning balance at Mar. 31, 2019	51	6,057	(102)	(22)	13,293	19,277
Net unrealized holding gain (loss)				10		10
Vesting of restricted stock	1	69				70
Net income					273	273
Ending balance at Jun. 30, 2019	52	6,126	(102)	(12)	13,566	19,630
Net unrealized holding gain (loss)				4		4
Vesting of restricted stock		69				69
Net income					574	574
Ending balance at Sep. 30, 2019	$ 52	$ 6,195	$ (102)	$ (8)	$ 14,140	$ 20,277