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Consolidated Statements of Stockholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2009
Consolidated Statements of Stockholders' Equity [Abstract]
Number of warrants to purchase one share of common stock issued as part of sale of stock (in shares)	1,043,478
Exercise price of warrants (in dollars per share)	$ 3.99

X

- Definition

Per share exercise price of warrants issued to purchase common stock.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Definition

Number of warrants to purchase one share of common stock issued as part of sale of stock.

+ References

No definition available.

+ Details

Name:	dcth_NumberOfWarrantsToIssuedAsPartOfStockIssuance
Namespace Prefix:	dcth_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:	us-gaap_
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