XML 19 R101.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Income Taxes - Additional Information (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Operating Loss Carryforwards [Line Items] |  |
Percentage of valuation allowance against deferred tax assets | 100.00% |
Decrease in deferred tax assets valuation allowance | $ 5,400,000 | $ 1,100,000
U.S. corporate income tax rate | 21.00% | 34.00%
Provisional income tax due to reduction in deferred tax assets |  | $ 143,500
New York State [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforwards net, expected to expire unutilized and unavailable to offset future federal taxable income | $ 157,200,000 |
New York City [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforwards net, expected to expire unutilized and unavailable to offset future federal taxable income | $ 141,500,000 |
Earliest Tax Year [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Open tax period | Dec. 31, 1998 |
Latest Tax Year [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Open tax period | Dec. 31, 2018 |
Federal [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforwards | $ 230,000,000 | 211,300,000
Operating loss carryforwards, annual limitation | 27,500 |
Operating loss carryforwards net, expected to expire unutilized and unavailable to offset future federal taxable income | 208,100,000 |
Operating loss carryforwards available for offset future taxable income | 21,900,000 |
Operating loss carryforwards for unlimited period | 20,200,000 |
Federal [Member] | Expire Between 2019 and 2037 [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforwards available for offset future taxable income | $ 1,700,000 |
Federal [Member] | Earliest Tax Year [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforwards, expiration dates | 2019 |
Federal [Member] | Latest Tax Year [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforwards, expiration dates | 2037 |
Federal [Member] | Research and Development Tax Credit Carryforwards [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Tax credit carryforwards | $ 5,000,000 | 4,300,000
Tax credit carryforwards, expiration dates | 2038 |
Tax credit carryforwards expected to expire unutilized | $ 200,000 |
State and City [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforwards | $ 10,100,000 | 10,100,000
Operating loss carryforwards, expiration dates | 2038 |
Foreign [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforwards | $ 25,200,000 | 25,000,000
Federal and State [Member] | Earliest Tax Year [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Open tax period | Dec. 31, 2015 |
Federal and State [Member] | Latest Tax Year [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Open tax period | Dec. 31, 2018 |
Minimum [Member] | State and City [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforwards | $ 27,300,000 | $ 27,300,000
Maximum [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
U.S. corporate income tax rate |  | 35.00%
Maximum [Member] | State and City [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforwards | $ 167,300,000 | $ 150,300,000

X
- Definition Open tax period. + References No definition available. + Details
Name: | dcth_OpenTaxPeriod
Namespace Prefix: | dcth_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Operating loss carry forwards expiration year. + References No definition available. + Details
Name: | dcth_OperatingLossCarryForwardsExpirationYear
Namespace Prefix: | dcth_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of annual limitations on the use of all operating loss carryforwards available to reduce future taxable income. + References No definition available. + Details
Name: | dcth_OperatingLossCarryforwardsAnnualLimitations
Namespace Prefix: | dcth_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Operating loss carryforwards available for offsetting against future taxable income. + References No definition available. + Details
Name: | dcth_OperatingLossCarryforwardsAvailableForOffsettingAgainstFutureTaxableIncome
Namespace Prefix: | dcth_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Operating loss carryforwards net expected to expire unutilized and unavailable to offset future federal taxable income. + References No definition available. + Details
Name: | dcth_OperatingLossCarryforwardsNetExpectedToExpireUnutilizedAndUnavailableToOffsetFutureFederalTaxableIncome
Namespace Prefix: | dcth_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Operating loss carryforwards not subject to expiration. + References No definition available. + Details
Name: | dcth_OperatingLossCarryforwardsNotSubjectToExpiration
Namespace Prefix: | dcth_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Tax credit carry forward expiration year. + References No definition available. + Details
Name: | dcth_TaxCreditCarryForwardExpirationYear
Namespace Prefix: | dcth_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tax credit carryforwards expected to expire unutilized. + References No definition available. + Details
Name: | dcth_TaxCreditCarryforwardsExpectedToExpireUnutilized
Namespace Prefix: | dcth_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Tax cuts and jobs Act of 2017, incomplete accounting, change in tax rate, deferred tax assets, provisional income tax (expense) benefit. + References No definition available. + Details
Name: | dcth_TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateDeferredTaxAssetsProvisionalIncomeTaxExpenseBenefit
Namespace Prefix: | dcth_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The percentage of the amount of valuation allowance to deferred tax asset. + References No definition available. + Details
Name: | dcth_ValuationAllowanceDeferredTaxAssetPercentage
Namespace Prefix: | dcth_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
Name: | us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
Name: | us-gaap_OperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_OperatingLossCarryforwardsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
Name: | us-gaap_TaxCreditCarryforwardAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=116821951&loc=d3e32123-109318 + Details
Name: | us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeTaxAuthorityNameAxis=us-gaap_NewYorkStateDivisionOfTaxationAndFinanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityNameAxis=dcth_NewYorkCityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_EarliestTaxYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_LatestTaxYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_DomesticCountryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=dcth_ExpireBetween2019And2037Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=us-gaap_ResearchMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_StateAndLocalJurisdictionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_ForeignCountryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=dcth_DomesticAndStateTaxAuthorityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |