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Accrued Expenses - Schedule of Accrued Expenses (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Payables And Accruals [Abstract]    
Compensation, excluding taxes $ 1,937us-gaap_AccruedSalariesCurrent $ 2,187us-gaap_AccruedSalariesCurrent
Professional fees 249us-gaap_AccruedProfessionalFeesCurrent 341us-gaap_AccruedProfessionalFeesCurrent
Short-term portion of lease restructuring 209dcth_ShortTermPortionOfLeaseRestructuring 239dcth_ShortTermPortionOfLeaseRestructuring
Deferred rent 43us-gaap_DeferredRentCreditCurrent 58us-gaap_DeferredRentCreditCurrent
Other 697us-gaap_OtherAccruedLiabilitiesCurrent 778us-gaap_OtherAccruedLiabilitiesCurrent
Total accrued expenses $ 3,135us-gaap_AccruedLiabilitiesCurrent $ 3,603us-gaap_AccruedLiabilitiesCurrent