Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Product revenues	$ 4,861	$ 5,361	$ 16,434	$ 17,825
Service revenues	2,387	2,109	6,375	5,655
Total revenues	7,248	7,470	22,809	23,480
Cost of sales	2,325	2,313	7,025	7,151
Gross profit	4,923	5,157	15,784	16,329
Operating expenses:
Selling, general and administrative	4,114	4,270	13,278	12,827
Research and development	1,822	1,753	5,682	5,016
Total operating expenses	5,936	6,023	18,960	17,843
Operating loss	(1,013)	(866)	(3,176)	(1,514)
Interest expense	(7)	(8)	(16)	(29)
Other income (loss), net	18	(14)	12	20
Loss before taxes	(1,002)	(888)	(3,180)	(1,523)
Income tax benefit (expense), net	302	(2,604)	899	(2,322)
Net loss	$ (700)	$ (3,492)	$ (2,281)	$ (3,845)
Net loss per share - basic (in Dollars per share)	$ (0.04)	$ (0.21)	$ (0.13)	$ (0.23)
Net loss per share - diluted (in Dollars per share)	$ (0.04)	$ (0.21)	$ (0.13)	$ (0.23)
Weighted average shares outstanding:
Basic (in Shares)	17,023	16,558	16,910	16,404
Diluted (in Shares)	17,023	16,558	16,910	16,404