CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME
Revenues	$ 578,634	$ 502,988	$ 403,516
Cost of goods sold	394,951	345,729	282,460
Gross profit	183,683	157,259	121,056
Operating costs and expenses:
Selling	24,713	21,877	17,249
General and administrative	58,403	50,677	42,419
Engineering and development	41,665	38,561	27,818
Business development	4,275	3,319	1,299
Amortization of intangible assets	12,313	11,169	6,245
Total operating costs and expenses	141,369	125,603	95,030
Operating income	42,314	31,656	26,026
Other expense, net:
Interest expense	12,383	7,692	3,236
Other expense (income), net	231	283	(323)
Total other expense, net	12,614	7,975	2,913
Income before income taxes	29,700	23,681	23,113
Income tax (provision) benefit	(5,603)	(6,292)	981
Net income	$ 24,097	$ 17,389	$ 24,094
Basic earnings per share:
Earnings per share	$ 1.51	$ 1.13	$ 1.67
Basic weighted average common shares	15,963	15,448	14,413
Diluted earnings per share:
Earnings per share	$ 1.48	$ 1.09	$ 1.66
Diluted weighted average common shares	16,272	15,951	14,517
Net income	$ 24,097	$ 17,389	$ 24,094
Other comprehensive income (loss):
Foreign currency translation adjustment	3,669	(9,516)	(7,193)
Change in accumulated (loss) income on derivatives, net of tax	(2,131)	5,376	1,618
Pension adjustments, net of tax	250	269	770
Comprehensive income	$ 25,885	$ 13,518	$ 19,289