CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net sales	$ 3,453	$ 4,410
Cost of sales	2,132	2,709
Gross profit	1,321	1,701
Operating expenses:
Selling, general and administrative	1,654	1,434
Research and development	443	467
Total operating expenses	2,097	1,901
Operating loss	(776)	(200)
Non-operating income (expense), net	(18)	143
Net loss	$ (794)	$ (57)
Earnings per common share - basic and diluted (in dollars per share)	$ (0.04)	$ 0.00
Weighted average common shares outstanding - basic and diluted: (in shares)	22,077	20,597