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

CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS? DEFICIT (Parenthetical)

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CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS? DEFICIT (Parenthetical) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Issuance of Series B-1 convertible preferred stock, issuance costs $ 106    
Evolv Technologies Holdings, Inc.      
Issuance of Series B-1 convertible preferred stock, issuance costs   $ 105 $ 938