Represents the number of inputs used for valuation of warrants.

No definition available.

Name:	dcth_NumberOfInputsUsedForValuationOfWarrants
Namespace Prefix:	dcth_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

+ Details

Name:	us-gaap_AssetsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_AssetsFairValueDisclosureAbstract
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- Details

Name:	us-gaap_FairValueDisclosuresAbstract
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Data Type:	xbrli:stringItemType
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- Details

Name:	us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of gain (loss) recognized in earnings, arising from liabilities measured at fair value on a recurring basis using unobservable inputs (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph c(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Issues that have taken place during the period in relation to liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Settlements that have taken place during the period in relation to liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy.

+ References

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This element represents a liability measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances.

+ References

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

This element represents the aggregate of the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

+ Details

Name:	us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Details

Name:	us-gaap_LiabilitiesFairValueDisclosureAbstract
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Assets and Liabilities Measured at Fair Value (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Assets and Liabilities Measured at Fair Value [Abstract]
Number of inputs used for valuation of warrants	6
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Roll Forward]
Beginning balance	$ 2,439	$ 18,005	$ 11,207
Total change in the fair value of the liability included in earnings	(2,159)	(15,566)	15,951
Fair value of warrants issued	4,055
Fair value of warrants exercised or expired	(908)		(9,153)
Ending balance	3,427	2,439	18,005
Recurring [Member] \| Derivative instruments liabilities [Member]
Liabilities [Abstract]
Total Liabilities	3,427	2,439
Recurring [Member] \| Derivative instruments liabilities [Member] \| Level 1 [Member]
Liabilities [Abstract]
Total Liabilities	0	0
Recurring [Member] \| Derivative instruments liabilities [Member] \| Level 2 [Member]
Liabilities [Abstract]
Total Liabilities	0	0
Recurring [Member] \| Derivative instruments liabilities [Member] \| Level 3 [Member]
Liabilities [Abstract]
Total Liabilities	3,427	2,439
Recurring [Member] \| Money market funds [Member]
Assets [Abstract]
Total Assets	1,967	25,417
Recurring [Member] \| Money market funds [Member] \| Level 1 [Member]
Assets [Abstract]
Total Assets	1,967	25,417
Recurring [Member] \| Money market funds [Member] \| Level 2 [Member]
Assets [Abstract]
Total Assets	0	0
Recurring [Member] \| Money market funds [Member] \| Level 3 [Member]
Assets [Abstract]
Total Assets	$ 0	$ 0