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CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (parenthetical) | 11 Months Ended
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Dec. 31, 2020 shares
Initial Public Offering [Member] |
Stockholders' Equity |
Units issued (in shares) | 41,400,000
Private Placement Warrants [Member] |
Stockholders' Equity |
Warrants issued (in shares) | 6,853,333

X
- Definition Number of warrants or rights issued during the period. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

X
- Definition Number of new units issued during the period. Each unit consists of one share of Class A common stock and one redeemable warrant. + References No definition available. + Details
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Namespace Prefix: | bfly_
Data Type: | xbrli:sharesItemType
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X
- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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Period Type: | duration

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=bfly_PrivatePlacementWarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |