CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
Revenues	$ 65,835	$ 60,479	$ 129,510	$ 120,059
Cost of goods sold	46,222	42,492	91,620	84,572
Gross margin	19,613	17,987	37,890	35,487
Operating costs and expenses:
Selling	2,635	2,063	5,059	4,271
General and administrative	5,878	5,822	12,287	11,375
Engineering and development	4,174	3,707	8,224	7,153
Business development	135		218
Amortization of intangible assets	828	660	1,607	1,322
Total operating costs and expenses	13,650	12,252	27,395	24,121
Operating income	5,963	5,735	10,495	11,366
Other expense (income):
Interest expense	1,590	1,511	3,122	3,026
Other expense, net	(130)	(19)	(115)	(285)
Total other expense, net	1,460	1,492	3,007	2,741
Income before income taxes	4,503	4,243	7,488	8,625
Provision for income taxes	(1,561)	(1,118)	(2,419)	(2,524)
Net income	$ 2,942	$ 3,125	$ 5,069	$ 6,101
Basic earnings per share:
Earnings per share (in dollars per share)	$ 0.31	$ 0.34	$ 0.54	$ 0.66
Basic weighted average common shares (in shares)	9,343	9,264	9,312	9,225
Diluted earnings per share:
Earnings per share (in dollars per share)	$ 0.31	$ 0.34	$ 0.54	$ 0.66
Diluted weighted average common shares (in shares)	9,343	9,264	9,312	9,225
Net income	$ 2,942	$ 3,125	$ 5,069	$ 6,101
Foreign currency translation adjustment	(1,066)	917	963	(3,562)
Change in accumulated (loss) income on derivatives	(17)	41	(122)	(59)
Comprehensive income (loss)	$ 1,859	$ 4,083	$ 5,910	$ 2,480