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

Subsequent Events (Details)

v3.21.2
Subsequent Events (Details) - Evolv Technologies Holdings Inc [Member] - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 05, 2021
Jan. 21, 2021
Mar. 31, 2021
Apr. 02, 2021
Feb. 04, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Subsequent Event [Line Items]                
Shares Issuable Upon Exercise of Warrant     5,127,237     5,127,237 740,991 3,386,246
Warrants exercise price             $ 0.15  
Subsequent events                
Subsequent Event [Line Items]                
Shares Issuable Upon Exercise of Warrant       6,756,653        
Warrants exercise price       $ 0.16        
Plan of merger with NHIC and Merger Sub | Subsequent events                
Subsequent Event [Line Items]                
Shares considered for exchange ratio 125,000,000              
Maximum number of earnout shares entitled to receive 15,000,000              
Period considered for closing share price 5 years              
Number of trading days considered for calculating the share price 20 days              
Threshold number of consecutive trading days taken for share price 30 days              
Subscription Agreements                
Subsequent Event [Line Items]                
Number of shares agreed to sell     30,000,000          
Purchase price of share     $ 10.00          
Aggregate purchase price     $ 300.0          
Subscription Agreements | Subsequent events                
Subsequent Event [Line Items]                
Number of shares agreed to sell 30,000,000              
Purchase price of share $ 10.00              
Aggregate purchase price $ 300.0              
2021 Convertible Notes                
Subsequent Event [Line Items]                
Interest rate   8.00%     8.00%      
2021 Convertible Notes | Subsequent events                
Subsequent Event [Line Items]                
Gross proceeds   $ 30.0            
Interest rate   8.00%            
Amount of notes convertible into shares   $ 100.0            
Conversion price as a percentage on price per share   80.00%