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RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS - Additional Information (Details) | May 26, 2020 USD ($)
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RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS |
Increase warrant liabilities | $ 6,709,333
Increase to accumulated deficit | $ 248,500

X
- Definition Amount of increase to accumulated deficit for transaction costs allocated to warrant laibility with a corresponding offset to additional paid in capital. + References No definition available. + Details
Name: | bfly_IncreaseToAccumulatedDeficitForTransactionCosts
Namespace Prefix: | bfly_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of increase to warrant liabilities. + References No definition available. + Details
Name: | bfly_IncreaseToWarrantLiabilities
Namespace Prefix: | bfly_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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