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Nature of Operations and Summary of Significant Accounting Policies, Revenue Recognition (Details) | 12 Months Ended
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Dec. 31, 2024
Revenue Recognition [Abstract] |
Maximum payment period received for transactions | 90 days

X
- Definition Payment is typically received in the period the transactions occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | bsvn_PaymentPeriodForTransactionsOccur
Namespace Prefix: | bsvn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration