CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues	$ 26,836	$ 28,862	$ 53,683	$ 55,586
Cost of products sold	18,685	20,062	37,895	38,837
Gross margin	8,151	8,800	15,788	16,749
Operating costs and expenses:
Selling	1,290	1,489	2,655	2,951
General and administrative	2,884	3,394	5,831	6,360
Engineering and development	1,563	1,550	3,116	3,084
Amortization of intangible assets	166	187	340	367
Total operating expenses	5,903	6,620	11,942	12,762
Operating income	2,248	2,180	3,846	3,987
Other (income) expense, net:
Interest expense	3	23	10	47
Other (income), net	(279)	(21)	(296)	(22)
Total other (income) expense, net	(276)	2	(286)	25
Income before income taxes	2,524	2,178	4,132	3,962
Provision for income taxes	(707)	(697)	(1,157)	(1,268)
Net income	1,817	1,481	2,975	2,694
Earnings per share (in dollars per share)	$ 0.21	$ 0.17	$ 0.35	$ 0.32
Basic weighted average common shares (in shares)	8,675	8,477	8,621	8,374
Diluted earnings per share:
Earnings per share (in dollars per share)	$ 0.21	$ 0.17	$ 0.35	$ 0.32
Diluted weighted average common shares (in shares)	8,675	8,523	8,621	8,539
Other comprehensive income, net of tax:
Foreign currency translation adjustment	(955)	153	(440)	881
Comprehensive income	$ 862	$ 1,634	$ 2,535	$ 3,575