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Stock-based Compensation (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended		132 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012
Non-cash, share-based compensation expense
Total	$ 306	$ 308	$ 2,588
Research and Development [Member]
Non-cash, share-based compensation expense
Total	94	117	590
Selling, General and Administrative [Member]
Non-cash, share-based compensation expense
Total	212	191	1,611
Restructuring [Member]
Non-cash, share-based compensation expense
Total			$ 387

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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