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Stockholders' Equity - Common Stock Warrants - Additional Information (Details) - $ / shares	Apr. 18, 2023	Mar. 31, 2023	Dec. 31, 2022
Stockholders Equity Note [Line Items]
Class Of Warrant Or Right Outstanding		5,235,140	5,153,291
Subsequent Event [Member]
Stockholders Equity Note [Line Items]
Class Of Warrant Or Right Outstanding	538,828
Class of warrants or rights exercise price per share	$ 0.01
Class of warrant or right exercised	538,828

X

- Definition

Class Of Warrant Or Right Exercised.

+ References

No definition available.

+ Details

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

X

- Definition

Stockholders equity note.

+ References

No definition available.

+ Details

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Namespace Prefix:	dcth_
Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644

+ Details

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X

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Details

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