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STOCK-BASED COMPENSATION, Non-vested Service-based Restricted Stock Unit Awards (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Service-Based Restricted Stock Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense $ 200,000   $ 600,000 $ 100,000
2019 213,038   213,038  
2020 777,537   777,537  
2021 758,325   758,325  
2022 721,284   721,284  
2023 509,910   509,910  
Unrecognized compensation cost $ 2,980,094   2,980,094  
Service-Based Restricted Stock Units [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense   $ 100,000    
Performance-Based Restricted Stock Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense     $ 0  
Restricted Stock and RSUs [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares vested (in shares)     1,408 16,648