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STOCKHOLDERS' EQUITY, Non-vested Service-based Awards (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Serviced Based Restricted Stock Units [Member]    
Share-based Compensation Expense [Abstract]    
Stock-based compensation expense $ 900,000 $ 800,000
Unrecognized compensation cost period of recognition 1 year 10 months 24 days  
2021 $ 811,580  
2022 759,540  
2023 516,286  
Unrecognized Expense 2,087,406  
Performance Based Restricted Stock Units [Member]    
Share-based Compensation Expense [Abstract]    
Stock-based compensation expense $ 0  
Restricted Stock and RSU [Member]    
Share-based Compensation Expense [Abstract]    
Number of shares issued from vesting of restricted stock (in shares) 128,619 93,408