CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues	$ 24,316	$ 27,331	$ 77,999	$ 82,917
Cost of products sold	17,217	19,118	55,112	57,955
Gross margin	7,099	8,213	22,887	24,962
Operating costs and expenses:
Selling	1,143	1,320	3,798	4,271
General and administrative	2,474	3,030	8,305	9,390
Engineering and development	1,454	1,417	4,570	4,501
Amortization of intangible assets	126	185	466	552
Total operating expenses	5,197	5,952	17,139	18,714
Operating income	1,902	2,261	5,748	6,248
Other (income) expense, net:
Interest expense	2	21	12	68
Other (income), net	(42)	78	(338)	56
Total other (income) expense, net	(40)	99	(326)	124
Income before income taxes	1,942	2,162	6,074	6,124
Provision for income taxes	(621)	(605)	(1,778)	(1,873)
Net income	1,321	1,557	4,296	4,251
Earnings per share (in dollars per share)	$ 0.15	$ 0.18	$ 0.50	$ 0.51
Basic weighted average common shares (in shares)	8,673	8,497	8,637	8,415
Diluted earnings per share:
Earnings per share (in dollars per share)	$ 0.15	$ 0.18	$ 0.50	$ 0.50
Diluted weighted average common shares (in shares)	8,673	8,511	8,637	8,564
Other comprehensive income, net of tax:
Foreign currency translation adjustment	305	(836)	(135)	45
Comprehensive income	$ 1,626	$ 721	$ 4,161	$ 4,296