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

Stock Based Compensation - Stock based compensation expenses by award type (Details)

v3.21.2
Stock Based Compensation - Stock based compensation expenses by award type (Details) - Evolv Technologies Holdings Inc [Member] - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Share-based Payment Arrangement, Expense $ 1,082 $ 62 $ 662 $ 264
Stock options        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Share-based Payment Arrangement, Expense 203 $ 62 $ 100  
Common Stock Warrant        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Share-based Payment Arrangement, Expense 807      
Restricted stock units        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Share-based Payment Arrangement, Expense $ 72