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Stock-Based Compensation (Details) (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 expense
Stock-based compensation	$ 1,110	$ 1,195	$ 3,447	$ 3,280
Cost of Sales [Member]
Schedule of Stock-based compensation expense
Stock-based compensation		2		13
Research and development [Member]
Schedule of Stock-based compensation expense
Stock-based compensation	52	63	167	199
Selling, general and administrative [Member]
Schedule of Stock-based compensation expense
Stock-based compensation	$ 1,058	$ 1,130	$ 3,280	$ 3,068

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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