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

Income Taxes - Operating Losses (Details)

v3.21.2
Income Taxes - Operating Losses (Details) - Evolv Technologies Holdings Inc [Member] - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Federal    
Operating Loss Carryforwards [Line Items]    
Net operating losses, subject to expiration $ 20.1 $ 20.1
Net operating losses, not subject to expiration $ 33.9 20.5
Percentage of offsetting future taxable income in any one tax period 80.00%  
State    
Operating Loss Carryforwards [Line Items]    
Net operating losses, subject to expiration $ 42.6 $ 29.8
UNITED KINGDOM    
Operating Loss Carryforwards [Line Items]    
Net operating losses, not subject to expiration $ 0.2