NOTES PAYABLE - Assumptions Used to Calculate Fair Value of Warrants (Details)	Mar. 31, 2021 Y item	Feb. 08, 2021 Y $ / shares	Dec. 31, 2020 $ / shares
10% Warrants | Current stock price
NOTES PAYABLE
Measurement input used to calculate fair value of warrants | $ / shares		1.12	0.53
10% Warrants | Exercise price
NOTES PAYABLE
Measurement input used to calculate fair value of warrants | $ / shares		0.56	0.56
10% Warrants | Risk-free interest rate
NOTES PAYABLE
Measurement input used to calculate fair value of warrants		0.48	0.38
10% Warrants | Expected term (in years)
NOTES PAYABLE
Measurement input used to calculate fair value of warrants | Y		5.0
10% Warrants | Expected volatility
NOTES PAYABLE
Measurement input used to calculate fair value of warrants		118	115
15% Warrants | Current stock price | Minimum
NOTES PAYABLE
Measurement input used to calculate fair value of warrants	0.45
15% Warrants | Current stock price | Maximum
NOTES PAYABLE
Measurement input used to calculate fair value of warrants	0.67
15% Warrants | Exercise price
NOTES PAYABLE
Measurement input used to calculate fair value of warrants	0.45
15% Warrants | Risk-free interest rate | Minimum
NOTES PAYABLE
Measurement input used to calculate fair value of warrants	0.0068
15% Warrants | Risk-free interest rate | Maximum
NOTES PAYABLE
Measurement input used to calculate fair value of warrants	0.0162
15% Warrants | Expected term (in years) | Minimum
NOTES PAYABLE
Measurement input used to calculate fair value of warrants | Y	0.83
15% Warrants | Expected term (in years) | Maximum
NOTES PAYABLE
Measurement input used to calculate fair value of warrants | Y	3.06
15% Warrants | Expected volatility | Minimum
NOTES PAYABLE
Measurement input used to calculate fair value of warrants	1.12
15% Warrants | Expected volatility | Maximum
NOTES PAYABLE
Measurement input used to calculate fair value of warrants	1.19