Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net revenues	$ 8,647	$ 10,188
Cost of revenues	4,580	5,270
Gross margin	4,067	4,918
Operating expenses:
Selling expense	1,335	1,487
Engineering and product development expense	991	942
General and administrative expense	1,645	1,807
Total operating expenses	3,971	4,236
Operating income	96	682
Other income (expense)	28	(11)
Earnings before income tax expense	124	671
Income tax expense	43	233
Net earnings	$ 81	$ 438
Net earnings per common share - basic (in dollars per share)	$ 0.01	$ 0.04
Weighted average common shares outstanding - basic (in shares)	10,390,002	10,465,414
Net earnings per common share - diluted (in dollars per share)	$ 0.01	$ 0.04
Weighted average common shares and common share equivalents outstanding - diluted (in shares)	10,404,244	10,483,527