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Current Accrued Expenses - Additional Information (Details)	Dec. 31, 2015	Dec. 31, 2014
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