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Consolidated Statements of Changes in Stockholders’ Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Stock issuance costs		$ 116
Secondary Equity Public Offering
Stock issuance costs	$ 10,820	$ 6,546

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- Definition

The cash outflow for cost incurred directly with the issuance of an equity security.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-15

+ Details

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

X

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=arqt_SecondaryEquityPublicOfferingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: