CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Net sales	$ 29,129	$ 27,870
Cost of goods sold	18,168	18,559
Gross profit	10,961	9,311
Operating expenses:
Selling expenses	3,404	3,372
General and administrative	4,770	5,111
Research and development	3,416	3,373
Total Operating expenses	11,590	11,856
Loss from operations	(629)	(2,545)
Other expense:
Interest expense	(242)	(277)
Loss before income taxes	(871)	(2,822)
Provision for income taxes	31	0
Net loss	(902)	(2,822)
Net loss per share, basic and diluted (in dollars per share)	$ (0.14)	$ (0.45)
Weighted average shares outstanding, basic and diluted (in shares)	6,223	6,216
Net loss	(902)	(2,822)
Changes in accumulated unrealized pension losses, net of taxes	(686)	953
Comprehensive loss	$ (1,588)	$ (1,869)