STOCKHOLDERS' EQUITY - Weighted average fair value of warrants granted, and the assumptions used in the Black-Scholes model (Details)	Sep. 30, 2020 Y $ / shares
Weighted average fair value of options granted
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input | $ / shares	5.00
Risk-free interest rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	0.37
Risk-free interest rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	0.89
Volatility | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	36.5
Volatility | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	41.4
Expected life (years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input | Y	2.50