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Share-based Compensation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		126 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012
Non-cash, share-based compensation expense
Total expenses	$ 78	$ 75	$ 169	$ 153	$ 2,451
Research and Development [Member]
Non-cash, share-based compensation expense
Total expenses	25	30	51	60	547
Selling, General and Administrative [Member]
Non-cash, share-based compensation expense
Total expenses	53	45	118	93	1,517
Restructuring [Member]
Non-cash, share-based compensation expense
Total expenses					$ 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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