CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Revenue, net	$ 41,444	$ 38,587
Cost, expenses and other (income):
Cost of goods sold, exclusive of depreciation and amortization	30,610	28,564
Selling, general and administrative	7,807	6,668
Depreciation and amortization	885	823
Interest expense	77	73
Other income, net	(10)	(11)
Total expenses	39,369	36,117
Income before income tax provision	2,075	2,470
Income tax provision	758	717
Net income	$ 1,317	$ 1,753
Basic
Net Income per share (in dollars per share)	$ 0.58	$ 0.79
Diluted
Net income per share (in dollars per share)	$ 0.57	$ 0.76