CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenue	$ 11,325	$ 9,465	$ 30,044	$ 28,708
Cost, expenses and other (income):
Cost of goods sold, exclusive of depreciation and amortization	8,036	7,043	22,706	20,888
Selling, general and administrative	2,080	1,658	5,523	4,815
Depreciation and amortization	209	198	637	610
Interest expense	18	18	56	54
Other income, net	(6)	(9)	(11)	(19)
Total expenses	10,337	8,908	28,911	26,348
Income before income tax provision	988	557	1,133	2,360
Income tax provision	317	191	331	732
Net income	$ 671	$ 366	$ 802	$ 1,628
Basic
Net Income per share (in dollars per share)	$ 0.30	$ 0.17	$ 0.35	$ 0.74
Diluted
Net income per share (in dollars per share)	$ 0.29	$ 0.16	$ 0.35	$ 0.71