XML 145 R136.htm IDEA: XBRL DOCUMENT v3.21.2

Convertible Preferred Stock - Conversion ratio (Details) - Evolv Technologies Holdings Inc [Member] $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Temporary Equity [Line Items]
Minimum gross proceeds from sale of common stock required for conversion	$ 50
Series A-1 Preferred Stock
Temporary Equity [Line Items]
Conversion ratio	1
Series B Preferred Stock
Temporary Equity [Line Items]
Conversion ratio	1
Series B-1 Preferred Stock
Temporary Equity [Line Items]
Conversion ratio	1
Series A Preferred Stock
Temporary Equity [Line Items]
Conversion ratio	2.0016	2.0016
Minimum gross proceeds from sale of common stock required for conversion		$ 50

X

- Definition

Represents the amount of minimum gross proceeds from sale of common stock required for conversion of temporary equity.

+ References

No definition available.

+ Details

Name:	evlv_MinimumGrossProceedsFromSaleOfCommonStockRequiredForConversion
Namespace Prefix:	evlv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents the conversion ratio of temporary equity.

+ References

No definition available.

+ Details

Name:	evlv_TemporaryEquityConversionRatio
Namespace Prefix:	evlv_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_TemporaryEquityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	dei_LegalEntityAxis=evlv_EvolvTechnologiesHoldingsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=evlv_Series1PreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=evlv_SeriesB1PreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: