CONSOLIDATED STATEMENTS OF INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Revenue	$ 38,587	$ 36,729
Cost, expenses and other (income):
Cost of goods sold, exclusive of depreciation and amortization	28,564	27,641
Selling, general and administrative	6,668	6,162
Depreciation and amortization	823	718
Interest expense	73	70
Arbitration award expense		50
Insurance proceeds - arbitration		(4,500)
Other income, net	(11)	(140)
Total expenses	36,117	30,001
Income before income tax provision	2,470	6,728
Income tax provision	717	2,131
Net income	$ 1,753	$ 4,597
Basic
Net income per share (in dollars per share)	$ 0.79	$ 2.11
Diluted
Net income per share (in dollars per share)	$ 0.76	$ 2.03