Evolv Technologies Holdings, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Additional Information (Details)

Fair Value Measurements - Additional Information (Details) - USD ($) $ in Thousands				1 Months Ended				2 Months Ended	3 Months Ended	12 Months Ended
	Jul. 16, 2021	Jul. 15, 2021	Jun. 21, 2021	Jul. 15, 2021	Jan. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Feb. 28, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Embedded Derivative, Fair Value of Embedded Derivative, Net [Abstract]
Percentage of shares issued to investors, conversion price equal						80.00%	80.00%
Change in fair value of derivative liability									$ 1,425	$ 0	$ 1,745
Contingent earn-out liability
Embedded Derivative, Fair Value of Embedded Derivative, Net [Abstract]
Expected dividend yield										$ 0
Contingent earn-out liability \| Expected volatility
Embedded Derivative, Fair Value of Embedded Derivative, Net [Abstract]
Contingent consideration, measurement input										90.00%
Contingent earn-out liability \| Measurement Input, Control Premium
Embedded Derivative, Fair Value of Embedded Derivative, Net [Abstract]
Contingent consideration, measurement input										25.00%
Contingent earn-out liability \| Expected term (in years)
Embedded Derivative, Fair Value of Embedded Derivative, Net [Abstract]
Contingent consideration term										3 years 2 months 12 days
Contingently issuable common stock liability
Embedded Derivative, Fair Value of Embedded Derivative, Net [Abstract]
Expected dividend yield										$ 0
Prior to the merger common stock	517,500	4,312,500
Shares vested		1,897,500
Outstanding shares expected to vest										1,897,500
Contingently issuable common stock liability \| Expected volatility
Embedded Derivative, Fair Value of Embedded Derivative, Net [Abstract]
Contingent consideration, measurement input										90.00%
Contingently issuable common stock liability \| Risk-free interest rate
Embedded Derivative, Fair Value of Embedded Derivative, Net [Abstract]
Contingent consideration, measurement input										4.20%
Contingently issuable common stock liability \| Measurement Input, Control Premium
Embedded Derivative, Fair Value of Embedded Derivative, Net [Abstract]
Contingent consideration, measurement input										25.00%
Contingently issuable common stock liability \| Expected term (in years)
Embedded Derivative, Fair Value of Embedded Derivative, Net [Abstract]
Contingent consideration term										3 years 7 months 6 days
Contingently issuable common stock liability \| Drift rate
Embedded Derivative, Fair Value of Embedded Derivative, Net [Abstract]
Contingent consideration, measurement input										4.20%
2020 Convertible Notes
Embedded Derivative, Fair Value of Embedded Derivative, Net [Abstract]
Percentage of specified financing event												100.00%
Percentage of conversion option was deemed at fair value of capital stock												20.00%
Fair value of the embedded derivative at issuance						$ 1,000						$ 1,000
2021 Convertible Notes
Embedded Derivative, Fair Value of Embedded Derivative, Net [Abstract]
Percentage of shares issued to investors, conversion price equal								80.00%
Percentage of conversion option was deemed at fair value of capital stock					20.00%
Fair value of the embedded derivative at issuance					$ 7,000
Percentage of conversion price per share of securities by investors					80.00%
Embedded derivative liability											$ 9,200
Number of shares issued upon conversion of debt			1,000,000
Derivative liability			$ 9,800
Shares issued of fair value of derivative liability			1,000,000
Change in fair value of derivative liability				$ 500