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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, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Service-Based Restricted Stock Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense $ 200,000 $ 200,000 $ 600,000 $ 600,000
2020 208,000   208,000  
2021 812,000   812,000  
2022 760,000   760,000  
2023 516,000   516,000  
Unrecognized compensation cost $ 2,296,000   2,296,000  
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 issued from vesting of restricted stock (in shares)     20,804