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

Warrants (Details)

v3.21.2
Warrants (Details) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended 11 Months Ended 12 Months Ended
Dec. 31, 2020
Mar. 31, 2020
Feb. 28, 2019
Mar. 31, 2021
Mar. 31, 2020
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Jun. 30, 2021
Class of Warrant or Right [Line Items]                    
Warrants to purchase shares of common stock                 3,386,246  
Issuance of equity classified warrants             $ 1,336,000      
Evolv Technologies Holdings, Inc.                    
Class of Warrant or Right [Line Items]                    
Warrants to purchase shares of common stock 5,127,237 740,991     740,991   5,127,237 5,127,237   5,127,237
Exercise price   $ 0.15     $ 0.15          
Issuance of equity classified warrants       $ 1,000 $ 45,000 $ 45,000   $ 112,000 $ 3,000  
Evolv Technologies Holdings, Inc. | 2019 SVB Common Stock Warrant                    
Class of Warrant or Right [Line Items]                    
Warrants to purchase shares of common stock     75,000              
Exercise price     $ 0.09              
Issuance of equity classified warrants     $ 100,000              
Evolv Technologies Holdings, Inc. | 2020 SVB Common Stock Warrant                    
Class of Warrant or Right [Line Items]                    
Warrants to purchase shares of common stock   740,991     740,991          
Exercise price   $ 0.15     $ 0.15          
Issuance of equity classified warrants   $ 100,000                
Evolv Technologies Holdings, Inc. | 2020 JPM Common Stock Warrant                    
Class of Warrant or Right [Line Items]                    
Warrants to purchase shares of common stock 1,000,000           1,000,000 1,000,000    
Exercise price $ 0.16           $ 0.16 $ 0.16    
Issuance of equity classified warrants $ 100,000                  
Evolv Technologies Holdings, Inc. | Maximum | 2019 SVB Common Stock Warrant                    
Class of Warrant or Right [Line Items]                    
Issuance of equity classified warrants     $ 100,000              
Evolv Technologies Holdings, Inc. | Maximum | 2020 SVB Common Stock Warrant                    
Class of Warrant or Right [Line Items]                    
Issuance of equity classified warrants   $ 100,000                
Evolv Technologies Holdings, Inc. | Maximum | 2020 JPM Common Stock Warrant                    
Class of Warrant or Right [Line Items]                    
Issuance of equity classified warrants $ 100,000