Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net revenues	$ 8,797	$ 8,973
Cost of revenues	4,612	4,868
Gross margin	4,185	4,105
Selling expense	1,326	1,189
Engineering and product development expense	923	996
General and administrative expense	1,532	1,556
Total operating expenses	3,781	3,741
Operating income	404	364
Other income	7	6
Earnings before income tax expense	411	370
Income tax expense	125	78
Net earnings	$ 286	$ 292
Net earnings per common share - basic (in Dollars per share)	$ 0.03	$ 0.03
Weighted average common shares outstanding - basic (in Shares)	10,393,956	10,327,428
Net earnings per common share - diluted (in Dollars per share)	$ 0.03	$ 0.03
Weighted average common shares and common share equivalents outstanding - diluted (in Shares)	10,448,911	10,366,312