Consolidated Statement of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net revenues	$ 10,485	$ 11,559	$ 19,132	$ 21,747
Cost of revenues	5,156	5,713	9,736	10,983
Gross margin	5,329	5,846	9,396	10,764
Operating expenses:
Selling expense	1,471	1,592	2,806	3,079
Engineering and product development expense	982	1,047	1,973	1,989
General and administrative expense	2,145	1,569	3,790	3,376
Total operating expenses	4,598	4,208	8,569	8,444
Operating income	731	1,638	827	2,320
Other income	18	21	46	10
Earnings before income tax expense	749	1,659	873	2,330
Income tax expense	263	579	306	812
Net earnings	$ 486	$ 1,080	$ 567	$ 1,518
Net earnings per common share - basic (in dollars per share)	$ 0.05	$ 0.10	$ 0.05	$ 0.15
Weighted average common shares outstanding - basic (in shares)	10,295,836	10,471,888	10,342,919	10,468,651
Net earnings per common share - diluted (in dollars per share)	$ 0.05	$ 0.10	$ 0.05	$ 0.14
Weighted average common shares and common share equivalents outstanding - diluted (in shares)	10,310,692	10,494,457	10,357,468	10,489,020