XML 65 R46.htm IDEA: XBRL DOCUMENT
v3.25.4

Summary of Significant Accounting Policies - Noncontrolling interest (Details) $ in Millions | Dec. 31, 2021 USD ($)
--- | ---
Related parties |
Noncontrolling Interest [Line Items] |
Cumulative contributions from noncontrolling interest owner | $ 3.8
VOLT |
Noncontrolling Interest [Line Items] |
Cumulative contributions from controlling interest owner | $ 11.9
VOLT |
Noncontrolling Interest [Line Items] |
Controlling interest percentage | 76.00%
VOLT | Related parties |
Noncontrolling Interest [Line Items] |
Noncontrolling interest percentage | 24.00%

X
- Definition Subsidiary, Cumulative Contributions, Noncontrolling Owner + References No definition available. + Details
Name: | brns_SubsidiaryCumulativeContributionsNoncontrollingOwner
Namespace Prefix: | brns_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Subsidiary, Cumulative Contributions, Parent + References No definition available. + Details
Name: | brns_SubsidiaryCumulativeContributionsParent
Namespace Prefix: | brns_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_MinorityInterestLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_RelatedPartyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=brns_SubsidiariesVOLTMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=brns_VOLTMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |