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

Fair Value of Financial Instruments - Summary of Level 3 warrants liabilities (Detail)

v3.21.2
Fair Value of Financial Instruments - Summary of Level 3 warrants liabilities (Detail) - Warrants Liabilities [Member] - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Balance at the beginning of the year $ 558 $ 1 $ 1 $ 542
Loss/(gain) from changes in fair value of the warrant liabilities     557 (541)
Balance at the ending of the year     558 1
Class A Common Stock Warrants [Member]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Balance at the beginning of the year 0      
Issuance of financial instruments carried at fair value 18,800      
Liability recorded at fair value 0      
Loss/(gain) from changes in fair value of the warrant liabilities 14,089      
Changes recorded in other comprehensive income 0      
Balance at the ending of the year 32,889   0  
Preferred Stock Warrant Series B And C [Member]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Balance at the beginning of the year 558 1 1  
Issuance of financial instruments carried at fair value 0      
Liability recorded at fair value 0      
Loss/(gain) from changes in fair value of the warrant liabilities 618 279    
Changes recorded in other comprehensive income 0      
Balance at the ending of the year 1,176 $ 280 558 $ 1
Convertible Bridge Notes [Member]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Balance at the beginning of the year 0      
Issuance of financial instruments carried at fair value 77,033      
Liability recorded at fair value 0      
Loss/(gain) from changes in fair value of the warrant liabilities 0      
Changes recorded in other comprehensive income 541      
Balance at the ending of the year 77,574   0  
Consent Fee Liability [Member]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Balance at the beginning of the year 0      
Issuance of financial instruments carried at fair value 0      
Liability recorded at fair value 2,715      
Loss/(gain) from changes in fair value of the warrant liabilities 268      
Changes recorded in other comprehensive income 0      
Balance at the ending of the year $ 2,983   $ 0