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Significant accounting policies (Details)	Jun. 30, 2025 subsidiary
Accounting Policies [Abstract]
Number of wholly-owed subsidiaries	1

X

- Definition

Represents the number of wholly owned subsidiaries included in the reporting of the financial statements.

+ References

No definition available.

+ Details

Name:	abus_WhollyOwnedSubsidiariesIncludedinFinancialStatements
Namespace Prefix:	abus_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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