Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net revenues	$ 11,681	$ 11,305	$ 37,185	$ 36,094
Cost of revenues	5,548	5,853	19,161	18,737
Gross margin	6,133	5,452	18,024	17,357
Operating expenses:
Selling expense	1,461	1,444	4,433	4,427
Engineering and product development expense	809	767	2,444	2,255
General and administrative expense	1,448	1,555	4,748	4,689
Total operating expenses	3,718	3,766	11,625	11,371
Operating income	2,415	1,686	6,399	5,986
Other income (expense):
Interest income	2	2	8	6
Interest expense	(1)	(18)	(3)	(54)
Other	4	24	66	37
Total other income (expense)	5	8	71	(11)
Earnings before income tax expense (benefit)	2,420	1,694	6,470	5,975
Income tax expense (benefit)	(2,762)	16	(2,624)	17
Net earnings	$ 5,182	$ 1,678	$ 9,094	$ 5,958
Net earnings per common share - basic (in Dollars per share)	$ 0.51	$ 0.17	$ 0.90	$ 0.60
Weighted average common shares outstanding - basic (in Shares)	10,182,795	10,033,034	10,132,807	10,011,173
Net earnings per common share - diluted (in Dollars per share)	$ 0.50	$ 0.17	$ 0.88	$ 0.59
Weighted average common and common share equivalents outstanding - diluted (in Shares)	10,297,284	10,194,580	10,287,055	10,127,329