Commitments and Contingencies (Details Textual) (USD $)	3 Months Ended	9 Months Ended	111 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Dec. 31, 2011
Commitments and Contingencies (Textual) [Abstract]
Lease expiration date			2013-06
Rent expense	$ 400,000	$ 300,000	$ 1,200,000	$ 900,000	$ 8,300,000
Bank deposit account shown as restricted investment on condensed consolidated balance sheets	$ 310,000		$ 310,000		$ 310,000	$ 310,000

Rental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses.

No definition available.

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration