CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenues	$ 26,847	$ 26,724
Cost of products sold	19,210	18,775
Gross margin	7,637	7,949
Operating expenses:
Selling	1,365	1,462
General and administrative	2,947	2,966
Engineering and development	1,553	1,534
Amortization of intangible assets	174	180
Total operating expenses	6,039	6,142
Operating income	1,598	1,807
Other income (expense), net:
Interest expense	(7)	(24)
Other income, net	17	1
Total other income (expense), net	10	(23)
Income before income taxes	1,608	1,784
Provision for income taxes	(450)	(571)
Net income	1,158	1,213
Basic earnings per share:
Earnings per share (in dollars per share)	$ 0.14	$ 0.15
Basic weighted average common shares (in shares)	8,565	8,279
Diluted earnings per share:
Earnings per share (in dollars per share)	$ 0.14	$ 0.14
Diluted weighted average common shares (in shares)	8,565	8,495
Other comprehensive income, net of tax:
Foreign currency translation adjustment	515	728
Comprehensive income	$ 1,673	$ 1,941