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Number of warrants exercised during the period.

No definition available.

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Threshold number of specified trading days for fair market value of common stock to trigger redemption.

No definition available.

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Warrants redemption period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

No definition available.

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The price per share at which the warrants can be redeemed.

No definition available.

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Price of the entity's common stock which would be required to be attained for the redemption of warrants.

No definition available.

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Threshold number of specified trading days that common stock price to must exceed threshold price within a specified consecutive trading period to trigger redemption.

No definition available.

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Percentage of shares owned for warrants settleable in cash in tender offer.

No definition available.

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Duration of trading day period associated with warrant redemption.

No definition available.

Name:	bfly_TradingDayPeriod
Namespace Prefix:	bfly_
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Exercise price per share or per unit of warrants or rights outstanding.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

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Period Type:	instant

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.

No definition available.

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Data Type:	xbrli:stringItemType
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Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

No definition available.

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Data Type:	xbrli:sharesItemType
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Period Type:	instant

Number of warrants or rights outstanding.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Amount of expense (income) related to adjustment to fair value of warrant liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 25
-Paragraph 13
-SubTopic 10
-Topic 480
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481766/480-10-25-13

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Data Type:	xbrli:monetaryItemType
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Data Type:	na
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Namespace Prefix:
Data Type:	na
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