STOCKHOLDERS' EQUITY - Weighted average fair value of warrants granted, and the assumptions used in the Black-Scholes model (Details)	3 Months Ended
	Mar. 31, 2021
Measurement Input Share Price [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	1.87
Measurement Input Risk Free Interest Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	0.26 %
Measurement Input Price Volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	49.43-50.12%
Measurement Input Expected Term [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	5
Dividend Yield [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	0.00 %