Summary of Significant Accounting Policies - Research and Development Incentives (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Accounting Policies [Abstract]
Research and development incentives	$ 3,983	$ 3,461

Represents the research and development incentives (expenses) for the period.

No definition available.

Name:	brns_ResearchAndDevelopmentIncentiveIncomeExpense
Namespace Prefix:	brns_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration