XML 49 R38.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Prepaid Expenses and Other Current Assets - Additional Information (Details) | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Prepaid Expense And Other Assets Current [Abstract] |  |
Maximum percentage of prepaid expenses and other current assets (in hundredths) | 5.00% | 5.00%

X
- Definition Maximum percentage of various prepaid expenses and other current assets to the aggregate prepaid expenses and other current assets. + References No definition available. + Details
Name: | dcth_MaximumPercentageOfPrepaidExpensesAndOtherCurrentAssets
Namespace Prefix: | dcth_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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