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Stock-Based Compensation (Details 8) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Schedule of Stock-based Compensation
Total	$ 808	$ 940	$ 2,346	$ 2,705
Sales and marketing [Member]
Schedule of Stock-based Compensation
Total	152	132	376	376
Research and development [Member]
Schedule of Stock-based Compensation
Total	173	201	586	639
General and administrative [Member]
Schedule of Stock-based Compensation
Total	$ 483	$ 607	$ 1,384	$ 1,690

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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