Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Product revenues	$ 5,974	$ 5,802
Service revenues	2,043	2,075
Total revenues	8,017	7,877
Cost of sales	2,295	2,335
Gross profit	5,722	5,542
Operating expenses:
Selling, general and administrative	4,751	4,685
Research and development	1,780	1,931
Total operating expenses	6,531	6,616
Operating loss	(809)	(1,074)
Interest expense	(14)	(5)
Other (loss) income, net	(83)	7
Loss before income taxes	(906)	(1,072)
Income tax (expense) benefit	(11)	121
Net loss	$ (917)	$ (951)
Net loss per share - basic (in Dollars per share)	$ (0.05)	$ (0.06)
Net loss per share - diluted (in Dollars per share)	$ (0.05)	$ (0.06)
Weighted average shares outstanding:
Basic (in Shares)	17,362	16,807
Diluted (in Shares)	17,362	16,807