Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Net revenues	$ 13,800	$ 15,260	$ 25,504	$ 24,789
Cost of revenues	7,002	7,892	13,613	12,884
Gross margin	6,798	7,368	11,891	11,905
Operating expenses:
Selling expense	1,587	1,754	2,972	2,983
Engineering and product development expense	822	787	1,635	1,488
General and administrative expense	1,666	1,653	3,300	3,134
Total operating expenses	4,075	4,194	7,907	7,605
Operating income	2,723	3,174	3,984	4,300
Other income (expense):
Interest income	3	1	6	4
Interest expense	(1)	(18)	(2)	(36)
Other	8	9	62	13
Total other income (expense)	10	(8)	66	(19)
Earnings before income tax expense (benefit)	2,733	3,166	4,050	4,281
Income tax expense (benefit)	78	(2)	138	1
Net earnings	$ 2,655	$ 3,168	$ 3,912	$ 4,280
Net earnings per common share - basic (in Dollars per share)	$ 0.26	$ 0.32	$ 0.39	$ 0.43
Weighted average common shares outstanding - basic (in Shares)	10,146,613	10,006,956	10,107,398	10,000,061
Net earnings per common share - diluted (in Dollars per share)	$ 0.26	$ 0.31	$ 0.38	$ 0.42
Weighted average common and common share equivalents outstanding - diluted (in Shares)	10,296,902	10,186,364	10,281,857	10,093,146