Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net sales	$ 146,132	$ 138,850	$ 139,307
Cost of sales	111,482	101,396	102,427
Gross profit	34,650	37,454	36,880
Selling, general, and administrative expenses	24,105	24,008	23,847
Restructuring costs	420	1,756	1,556
Material overcharge settlement	(2,114)
(Gain) loss on sales of property, plant and equipment	2	(24)	(84)
Operating income	12,237	11,714	11,561
Other (income) expenses:
Interest income	(149)	(114)	(46)
Interest expense	69	87	154
Other, net			(312)
Total other (income) expense	(80)	(27)	(204)
Income before income tax provision	12,317	11,741	11,765
Income tax expense	4,347	4,148	4,206
Net income from consolidated operations	$ 7,970	$ 7,593	$ 7,559
Net income per share:
Basic (in dollars per share)	$ 1.11	$ 1.07	$ 1.08
Diluted (in dollars per share)	$ 1.10	$ 1.05	$ 1.05
Weighted average common shares:
Weighted Average Number of Shares Outstanding, Basic	7,190	7,102	7,028
Weighted Average Number of Shares Outstanding, Diluted	7,275	7,206	7,175