Commitments and Contingencies (Details 2) (USD $)	12 Months Ended				0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 27, 2013	Nov. 15, 2013 Capstone
Leases
Remaining contractual obligation for base rent related to lease terminated				$ 61,000,000
Termination obligation under the Surrender Agreement				19,500,000
Termination obligation payable in cash under the Surrender Agreement				15,600,000
Deposit retained by landlord related to lease terminated				3,900,000
Lease restructuring charge	19,000,000
Future Minimum Lease Payments
2014	1,431,000
2015	712,000
Total	2,143,000
Sublease Rental Income
2014	974,000
2015	530,000
Total	1,504,000
Net Lease Payments
2014	457,000
2015	182,000
Total	639,000
Rental expense, net of sublease rental income	500,000	700,000	500,000		12,000
Commitments and contingencies
Monthly base rental payments for sublease	$ 500,000	$ 700,000	$ 500,000		$ 12,000
Minimum notice period required for adjusting space needs under sublease arrangements					30 days