Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net revenues	$ 13,576	$ 13,800	$ 24,307	$ 25,504
Cost of revenues	7,382	7,002	13,517	13,613
Gross margin	6,194	6,798	10,790	11,891
Operating expenses:
Selling expense	1,555	1,587	2,961	2,972
Engineering and product development expense	980	822	1,904	1,635
General and administrative expense	1,665	1,666	3,656	3,300
Restructuring and other charges			359
Total operating expenses	4,200	4,075	8,880	7,907
Operating income	1,994	2,723	1,910	3,984
Other income (expense):
Interest income	1	3	2	6
Interest expense		(1)		(2)
Other	(1)	8	11	62
Total other income	0	10	13	66
Earnings before income tax expense	1,994	2,733	1,923	4,050
Income tax expense	660	78	632	138
Net earnings	$ 1,334	$ 2,655	$ 1,291	$ 3,912
Net earnings per common share - basic (in Dollars per share)	$ 0.13	$ 0.26	$ 0.13	$ 0.39
Weighted average common shares outstanding - basic (in Shares)	10,273,812	10,146,613	10,239,463	10,107,398
Net earnings per common share - diluted (in Dollars per share)	$ 0.13	$ 0.26	$ 0.130	$ 0.38
Weighted average common shares and common share equivalents outstanding - diluted (in Shares)	10,359,657	10,296,902	10,342,014	10,281,857