Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Product revenues	$ 21,674	$ 23,877
Service revenues	8,548	7,710
Total revenues	30,222	31,587
Cost of sales	9,319	9,473
Gross profit	20,903	22,114
Operating expenses:
Selling, general and administrative	17,209	17,287
Research and development	7,443	6,775
Total operating expenses	24,652	24,062
Operating loss	(3,749)	(1,948)
Interest expense	(28)	(37)
Other income, net	15	16
Loss before income taxes	(3,762)	(1,969)
Income tax expense, net	(18,539)	(2,277)
Net loss	$ (22,301)	$ (4,246)
Net loss per share:
Basic (in Dollars per share)	$ (1.31)	$ (0.26)
Diluted (in Dollars per share)	$ (1.31)	$ (0.26)
Weighted average shares used in computing net loss per share:
Basic (in Shares)	16,961	16,458
Diluted (in Shares)	16,961	16,458