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

FAIR VALUE MEASUREMENTS - Initial measurement (Details)

v3.21.2
FAIR VALUE MEASUREMENTS - Initial measurement (Details)
 6 Months Ended 12 Months Ended
Oct. 22, 2019
USD ($)
$ / shares
Jun. 30, 2021
USD ($)
$ / shares
Jun. 30, 2020
USD ($)
$ / shares
Dec. 31, 2020
USD ($)
$ / shares
Sep. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
$ / shares
Fair Value Measurement Inputs and Valuation Techniques [Line Items]              
Fair value assets level 1 to level 2 transfers   $ 0   $ 0      
Fair value assets level 2 to level 1 transfers   0   0      
Fair value assets transferred into (out of) level 3   0   0      
Fair value liabilities transfers from level 1 to level 2   0   0      
Fair value liabilities transfers from level 2 to level 1   0   0      
Fair value liabilities transfers in and out of level 3   0   0      
Price of warrant | $ / shares $ 0.33            
Aggregate values of warrants issued $ 1,356,300 $ 12,330,000 $ 2,383,800 $ 3,452,400 $ 2,548,200 $ 1,027,500 $ 1,972,800
Risk-free interest rate              
Fair Value Measurement Inputs and Valuation Techniques [Line Items]              
Warrants measurement input 1.61     0.28     1.70
Dividend yield              
Fair Value Measurement Inputs and Valuation Techniques [Line Items]              
Warrants measurement input 0.00     0.00     0.00
Implied volatility              
Fair Value Measurement Inputs and Valuation Techniques [Line Items]              
Warrants measurement input 7.3     15.4     8.6
Exercise price              
Fair Value Measurement Inputs and Valuation Techniques [Line Items]              
Warrants measurement input | $ / shares 11.50     11.50     11.50
Market Stock Price              
Fair Value Measurement Inputs and Valuation Techniques [Line Items]              
Warrants measurement input | $ / shares 9.80     10.20     9.80
Private Placement Warrants              
Fair Value Measurement Inputs and Valuation Techniques [Line Items]              
Price of warrant | $ / shares   $ 3 $ 0.84        
Aggregate values of warrants issued $ 1,400,000 $ 12,330,000 $ 3,500,000 $ 3,452,400     $ 1,972,800
Private Placement Warrants | Risk-free interest rate              
Fair Value Measurement Inputs and Valuation Techniques [Line Items]              
Warrants measurement input   0.80 0.28        
Private Placement Warrants | Dividend yield              
Fair Value Measurement Inputs and Valuation Techniques [Line Items]              
Warrants measurement input   0.00 0.00        
Private Placement Warrants | Implied volatility              
Fair Value Measurement Inputs and Valuation Techniques [Line Items]              
Warrants measurement input   40.04 15.4        
Private Placement Warrants | Exercise price              
Fair Value Measurement Inputs and Valuation Techniques [Line Items]              
Warrants measurement input   11.50 11.50        
Private Placement Warrants | Market Stock Price              
Fair Value Measurement Inputs and Valuation Techniques [Line Items]              
Warrants measurement input   10.00 10.20