FAIR VALUE MEASUREMENTS, Key Inputs into Level 3 Fair Value Measurements (Details)	Jun. 30, 2021 $ / shares
Key Inputs into Monte Carlo Simulation Model [Abstract]
Term	5 years
Risk-Free Interest Rate [Member] | FPA [Member]
Key Inputs into Monte Carlo Simulation Model [Abstract]
Measurement input	0.0011
Remaining term [Member] | FPA [Member]
Key Inputs into Monte Carlo Simulation Model [Abstract]
Term	1 year 2 months 23 days
Expected volatility [Member]
Key Inputs into Monte Carlo Simulation Model [Abstract]
Measurement input	0.185
Exercise Price [Member]
Key Inputs into Monte Carlo Simulation Model [Abstract]
Measurement input	11.50
Stock Price [Member]
Key Inputs into Monte Carlo Simulation Model [Abstract]
Measurement input	9.80