CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME
Revenues		$ 310,611	$ 252,012	$ 245,893
Cost of goods sold		219,208	176,333	172,889
Gross profit		91,403	75,679	73,004
Operating costs and expenses:
Selling		11,807	10,979	9,986
General and administrative		32,037	24,926	24,333
Engineering and development		19,913	17,542	16,170
Business development		762	213	428
Amortization of intangible assets		3,655	3,219	3,204
Total operating costs and expenses		68,174	56,879	54,121
Operating income		23,229	18,800	18,883
Other expense (income):
Interest expense		2,701	2,474	6,449
Other (income) expense, net		(153)	190	(369)
Total other expense, net		2,548	2,664	6,080
Income before income taxes		20,681	16,136	12,803
Provision for income taxes		(4,756)	(8,100)	(3,725)
Net income		$ 15,925	$ 8,036	$ 9,078
Basic earnings per share:
Earnings per share (in dollars per share)		$ 1.72	$ 0.88	$ 1.01
Basic weighted average common shares (in shares)		9,265	9,153	9,011
Diluted earnings per share:
Earnings per share (in dollars per share)		$ 1.70	$ 0.87	$ 1.00
Diluted weighted average common shares (in shares)		9,370	9,275	9,105
Net income		$ 15,925	$ 8,036	$ 9,078
Other comprehensive income:
Foreign currency translation adjustment		(3,109)	6,314	(1,989)
Change in accumulated income (loss) on derivatives	[1]	238	226	(3)
Pension adjustments	[2]	(61)	(123)	(134)
Comprehensive income		$ 12,993	$ 14,453	$ 6,952

[1] Net of tax of $132 for the period ended December 31, 2018.

[2] Net of tax of $2, ($21) and $78 for the periods ended December 31, 2018, 2017 and 2016, respectively.