Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net revenues	$ 11,559	$ 12,343	$ 21,747	$ 21,140
Cost of revenues	5,713	6,261	10,983	10,873
Gross margin	5,846	6,082	10,764	10,267
Operating expenses:
Selling expense	1,592	1,530	3,079	2,856
Engineering and product development expense	1,047	887	1,989	1,810
General and administrative expense	1,569	1,621	3,376	3,153
Total operating expenses	4,208	4,038	8,444	7,819
Operating income	1,638	2,044	2,320	2,448
Other income	21	10	10	17
Earnings before income tax expense	1,659	2,054	2,330	2,465
Income tax expense	579	697	812	822
Net earnings	$ 1,080	$ 1,357	$ 1,518	$ 1,643
Net earnings per common share - basic (in Dollars per share)	$ 0.10	$ 0.13	$ 0.15	$ 0.16
Weighted average common shares outstanding - basic (in Shares)	10,471,888	10,436,730	10,468,651	10,415,461
Net earnings per common share - diluted (in Dollars per share)	$ 0.10	$ 0.13	$ 0.14	$ 0.16
Weighted average common shares and common share equivalents outstanding - diluted (in Shares)	10,494,457	10,456,183	10,489,020	10,452,567