CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME
Revenues	$ 96,633	$ 80,092	$ 283,159	$ 236,649
Cost of goods sold	66,603	56,330	197,045	166,816
Gross profit	30,030	23,762	86,114	69,833
Operating costs and expenses:
Selling	4,144	2,762	12,373	8,402
General and administrative	9,932	8,177	28,451	23,969
Engineering and development	5,705	4,692	17,188	14,610
Business development	8	33	64	349
Amortization of intangible assets	1,429	872	4,291	2,634
Total operating costs and expenses	21,218	16,536	62,367	49,964
Operating income	8,812	7,226	23,747	19,869
Other expense (income):
Interest expense	1,359	623	3,974	1,839
Other expense (income), net	140	(24)	121	(118)
Total other expense, net	1,499	599	4,095	1,721
Income before income taxes	7,313	6,627	19,652	18,148
Provision for income taxes	(2,695)	(1,767)	(6,119)	(4,859)
Net income	$ 4,618	$ 4,860	$ 13,533	$ 13,289
Basic earnings per share:
Earnings per share (in dollars per share)	$ 0.49	$ 0.52	$ 1.44	$ 1.44
Basic weighted average common shares (in shares)	9,414	9,273	9,390	9,251
Diluted earnings per share:
Earnings per share (in dollars per share)	$ 0.49	$ 0.52	$ 1.43	$ 1.42
Diluted weighted average common shares (in shares)	9,464	9,371	9,435	9,337
Net income	$ 4,618	$ 4,860	$ 13,533	$ 13,289
Other comprehensive income:
Foreign currency translation adjustment	(2,369)	(307)	(2,708)	(2,152)
(Loss) income on derivatives	(105)	137	(803)	988
Comprehensive income	$ 2,144	$ 4,690	$ 10,022	$ 12,125