CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Revenue	$ 9,465	$ 9,709	$ 28,708	$ 27,122
Cost, expenses and other (income):
Cost of goods sold, exclusive of depreciation and amortization	7,043	6,893	20,888	20,295
Selling, general and administrative	1,658	1,486	4,815	4,563
Depreciation and amortization	198	185	610	525
Interest expense	18	18	54	53
Arbitration award expense				50
Insurance proceeds - arbitration				(4,500)
Other income, net	(9)	(1)	(19)	(131)
Total expenses	8,908	8,581	26,348	20,855
Income before income tax provision	557	1,128	2,360	6,267
Income tax provision	191	384	732	2,131
Net income	$ 366	$ 744	$ 1,628	$ 4,136
Basic
Net income per share (in dollars per share)	$ 0.17	$ 0.34	$ 0.74	$ 1.90
Diluted
Net income per share (in dollars per share)	$ 0.16	$ 0.33	$ 0.71	$ 1.83