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STOCKHOLDERS' EQUITY - Feinsod Employment Agreement (Details)
12 Months Ended
Aug. 06, 2019
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Mar. 31, 2020
$ / shares
STOCKHOLDERS' EQUITY (Details) Feinsod Employment Agreement [Line Items]        
Exercise price of warrants | $ / shares       $ 1.00
Stock-based compensation expense | $   $ 1,504,389 $ 3,966,621  
Feinsod Agreement 2019 [Member]        
STOCKHOLDERS' EQUITY (Details) Feinsod Employment Agreement [Line Items]        
Number of shares, granted | shares 1,000,000      
Exercise price of warrants | $ / shares $ 4.51      
Threshold, consecutive trading days | $ 5      
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic and Diluted Share | $ / shares $ 0.83      
Stock-based compensation expense | $   $ 57,342 $ 116,000  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 10 years