Segment Reporting (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Segment Reporting (Textual) [Abstract]
Reimbursed research and development costs	$ 665	$ 154	$ 1,107	$ 346