CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Revenue	$ 10,296	$ 9,242	$ 19,243	$ 17,413
Cost, expenses and other (income):
Cost of goods sold, exclusive of depreciation and amortization	7,129	6,926	13,845	13,402
Selling, general and administrative	1,521	1,312	3,157	3,077
Depreciation and amortization	205	177	412	340
Interest expense	17	14	36	35
Arbitration award expense				50
Insurance proceeds - arbitration				(4,500)
Other income, net	(10)	(128)	(10)	(130)
Total expenses	8,862	8,301	17,440	12,274
Income before income tax provision	1,434	941	1,803	5,139
Income tax provision	430	320	541	1,747
Net income	$ 1,004	$ 621	$ 1,262	$ 3,392
Basic
Net income per share (in dollars per share)	$ 0.45	$ 0.28	$ 0.57	$ 1.56
Diluted
Net income per share (in dollars per share)	$ 0.43	$ 0.27	$ 0.55	$ 1.50