Other Long-Term Obligations and Commitments (Details Textual) (USD $)	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Other Long Term Obligations and Commitments (Textual) [Abstract]
Lease period description	Term of more than one year
Rent expense for office space	$ 191,000	$ 226,000

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