Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net revenues	$ 12,343	$ 11,218	$ 21,140	$ 20,191
Cost of revenues	6,261	5,753	10,873	10,621
Gross margin	6,082	5,465	10,267	9,570
Selling expense	1,530	1,528	2,856	2,717
Engineering and product development expense	887	925	1,810	1,921
General and administrative expense	1,621	1,523	3,153	3,079
Total operating expenses	4,038	3,976	7,819	7,717
Operating income	2,044	1,489	2,448	1,853
Other income (expense)	10	(2)	17	4
Earnings before income tax expense	2,054	1,487	2,465	1,857
Income tax expense	697	484	822	562
Net earnings	$ 1,357	$ 1,003	$ 1,643	$ 1,295
Net earnings per common share - basic (in Dollars per share)	$ 0.13	$ 0.10	$ 0.16	$ 0.13
Weighted average common shares outstanding - basic (in Shares)	10,436,730	10,371,716	10,415,461	10,349,695
Net earnings per common share - diluted (in Dollars per share)	$ 0.13	$ 0.10	$ 0.16	$ 0.13
Weighted average common shares and common share equivalents outstanding - diluted (in Shares)	10,456,183	10,394,094	10,452,567	10,380,279