CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
Revenues	$ 61,040	$ 61,534	$ 190,550	$ 181,593
Cost of goods sold	43,434	42,595	135,054	127,167
Gross margin	17,606	18,939	55,496	54,426
Operating costs and expenses:
Selling	2,431	1,963	7,490	6,234
General and administrative	5,264	5,939	17,551	17,314
Engineering and development	3,961	3,345	12,185	10,498
Business development	123		341
Amortization of intangible assets	802	661	2,409	1,983
Total operating costs and expenses	12,581	11,908	39,976	36,029
Operating income	5,025	7,031	15,520	18,397
Other expense (income):
Interest expense	1,504	1,504	4,626	4,530
Other income, net	(75)	(115)	(190)	(400)
Total other expense, net	1,429	1,389	4,436	4,130
Income before income taxes	3,596	5,642	11,084	14,267
Provision for income taxes	(1,076)	(1,364)	(3,495)	(3,888)
Net income	$ 2,520	$ 4,278	$ 7,589	$ 10,379
Basic earnings per share:
Earnings per share (in dollars per share)	$ 0.27	$ 0.46	$ 0.81	$ 1.12
Basic weighted average common shares (in shares)	9,350	9,266	9,325	9,239
Diluted earnings per share:
Earnings per share (in dollars per share)	$ 0.27	$ 0.46	$ 0.81	$ 1.12
Diluted weighted average common shares (in shares)	9,350	9,266	9,325	9,239
Net income	$ 2,520	$ 4,278	$ 7,589	$ 10,379
Foreign currency translation adjustment	383	400	1,346	(3,162)
Change in accumulated (loss) income on derivatives	66	(87)	(56)	(146)
Comprehensive income (loss)	$ 2,969	$ 4,591	$ 8,879	$ 7,071