CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME
Revenues		$ 371,084	$ 310,611	$ 252,012
Cost of goods sold		258,500	219,208	176,333
Gross profit		112,584	91,403	75,679
Operating costs and expenses:
Selling		16,536	11,807	10,979
General and administrative		37,688	32,037	24,926
Engineering and development		23,086	19,913	17,542
Business development		113	762	213
Amortization of intangible assets		5,718	3,655	3,219
Total operating costs and expenses		83,141	68,174	56,879
Operating income		29,443	23,229	18,800
Other expense (income):
Interest expense		5,134	2,701	2,474
Other (income) expense, net		468	(153)	190
Total other expense, net		5,602	2,548	2,664
Income before income taxes		23,841	20,681	16,136
Provision for income taxes		(6,819)	(4,756)	(8,100)
Net income		$ 17,022	$ 15,925	$ 8,036
Basic earnings per share:
Earnings per share (in dollars per share)		$ 1.81	$ 1.72	$ 0.88
Basic weighted average common shares (in shares)		9,398	9,265	9,153
Diluted earnings per share:
Earnings per share (in dollars per share)		$ 1.80	$ 1.70	$ 0.87
Diluted weighted average common shares (in shares)		9,461	9,370	9,275
Net income		$ 17,022	$ 15,925	$ 8,036
Other comprehensive income:
Foreign currency translation adjustment		(680)	(3,109)	6,314
Change in accumulated income (loss) on derivatives (1)	[1]	(711)	238	226
Pension adjustments	[2]	(622)	(61)	(123)
Comprehensive income		$ 15,009	$ 12,993	$ 14,453

[1] Net of tax of ($218) and $132 for the years ended December 31, 2019 and 2018, respectively.

[2] Net of tax of $186, $2 and ($21) for the years ended December 31, 2019, 2018 and 2017, respectively.