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v3.3.1.900

Current Accrued Expenses - Additional Information (Details) | Dec. 31, 2015 | Dec. 31, 2014
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Payables And Accruals [Abstract] |  |
Maximum percentage of current liabilities accrued (in hundredths) | 5.00% | 5.00%

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- Definition Maximum percentage of various single other accrued expenses to the aggregate current liabilities. + References No definition available. + Details
Name: | dcth_MaximumPercentageOfCurrentLiabilitiesAccrued
Namespace Prefix: | dcth_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_PayablesAndAccrualsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration