CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME
Revenues	$ 502,988	$ 403,516	$ 366,694
Cost of goods sold	345,729	282,460	258,119
Gross profit	157,259	121,056	108,575
Operating costs and expenses:
Selling	21,877	17,249	15,392
General and administrative	50,677	42,419	38,301
Engineering and development	38,561	27,818	25,487
Business development	3,319	1,299	473
Amortization of intangible assets	11,169	6,245	5,928
Total operating costs and expenses	125,603	95,030	85,581
Operating income	31,656	26,026	22,994
Other expense, net:
Interest expense	7,692	3,236	3,716
Other expense (income), net	283	(323)	502
Total other expense, net	7,975	2,913	4,218
Income before income taxes	23,681	23,113	18,776
Income tax (provision) benefit	(6,292)	981	(5,133)
Net income	$ 17,389	$ 24,094	$ 13,643
Basic earnings per share:
Earnings per share	$ 1.13	$ 1.67	$ 0.96
Basic weighted average common shares	15,448	14,413	14,243
Diluted earnings per share:
Earnings per share	$ 1.09	$ 1.66	$ 0.95
Diluted weighted average common shares	15,951	14,517	14,333
Net income	$ 17,389	$ 24,094	$ 13,643
Other comprehensive (loss) income:
Foreign currency translation adjustment	(9,516)	(7,193)	8,410
Change in accumulated income (loss) on derivatives	5,376	1,618	(1,161)
Pension adjustments	269	770	(5)
Comprehensive income	$ 13,518	$ 19,289	$ 20,887