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

Convertible Preferred Stock - Preferred Stock (Details)

v3.21.2
Convertible Preferred Stock - Preferred Stock (Details) - Evolv Technologies Holdings Inc [Member] - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 2 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2020
Feb. 29, 2020
Dec. 31, 2019
Oct. 31, 2019
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Temporary Equity [Line Items]                  
Number of shares issued and sold             8,486,175 8,486,175 63,785,925
Series B-1 Preferred Stock                  
Temporary Equity [Line Items]                  
Number of shares issued and sold       50,632,353 8,486,175       13,153,572
Purchase price       $ 0.3653 $ 0.3653 $ 0.3653   $ 0.3653 $ 0.3653
Aggregate proceeds from issuance     $ 4.8 $ 18.5 $ 3.1        
Issuance costs $ 0.1 $ 0.1 $ 0.0 $ 0.9 $ 0.1        
Conversion of convertible note into Series B-1 convertible preferred stock       18,056,296 8,486,175        
Conversion price $ 0.3653 $ 0.3653   $ 0.3105 $ 0.3653   $ 0.3653    
Settlement of principal and accrued interest       $ 5.6