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Commitments and Contingencies (Details 2) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Operating Leased Assets  
Operating Leases, Future Minimum Payments Due, Next Twelve Months $ 1,075us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
Operating Leases, Future Minimum Payments, Due in Two Years 1,101us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
Operating Leases, Future Minimum Payments, Due in Three Years 1,128us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
Operating Leases, Future Minimum Payments, Due in Four Years 572us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
Operating Leases, Future Minimum Payments Due $ 3,876us-gaap_OperatingLeasesFutureMinimumPaymentsDue