General form of registration statement for all companies including face-amount certificate companies

Convertible Preferred Stock (Details)

v3.21.2
Convertible Preferred Stock (Details) - Evolv Technologies Holdings, Inc. - $ / shares
 1 Months Ended 2 Months Ended 6 Months Ended 12 Months Ended
Oct. 31, 2019
Mar. 31, 2020
Jun. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Series B-1 Preferred Stock          
Temporary Equity [Line Items]          
Original Issue Price $ 0.3653 $ 0.3653 $ 0.3653 $ 0.3653 $ 0.3653
Series B Preferred Stock          
Temporary Equity [Line Items]          
Original Issue Price     0.3512 0.3512  
Series A-1 Preferred Stock          
Temporary Equity [Line Items]          
Original Issue Price     0.2792 0.2792  
Series A Preferred Stock          
Temporary Equity [Line Items]          
Original Issue Price     $ 1.28 $ 1.28