STOCKHOLDERS' EQUITY - Weighted average fair value of warrants granted, and the assumptions used in the Black-Scholes model (Details)	Dec. 31, 2020
Measurement Input Share Price [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	5.00
Measurement Input Risk Free Interest Rate [Member] | Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	0.37
Measurement Input Risk Free Interest Rate [Member] | Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	0.89
Measurement Input Price Volatility [Member] | Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	36.5
Measurement Input Price Volatility [Member] | Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	41.4
Measurement Input Expected Term [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	2.50
Dividend Yield [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	0.00