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PREPAID EXPENSES AND OTHER CURRENT ASSETS - Narrative (Details) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Jul. 31, 2020
Jul. 31, 2019
Short-term Debt [Line Items]        
Note payable $ 191,395 $ 477,028    
Note Payable        
Short-term Debt [Line Items]        
Principal amount     $ 900,000 $ 900,000
Interest rate     2.49% 4.61%