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Commitment and Contingencies - Narrative (Details) $ in Millions | Jan. 07, 2026 USD ($)
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Commitments and Contingencies Disclosure [Abstract] |
Litigation settlement, amount awarded to other party | $ 7.5
Litigation settlement, amount awarded to other party, funded by insurance procees | $ 7.4

X
- Definition Litigation Settlement, Amount Awarded to Other Party, Funded From Insurance Proceeds + References No definition available. + Details
Name: | bksy_LitigationSettlementAmountAwardedToOtherPartyFundedFromInsuranceProceeds
Namespace Prefix: | bksy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition Amount awarded to other party in judgment or settlement of litigation. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementAmountAwardedToOtherParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration