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STOCK-BASED COMPENSATION, Non-nested, Service-based Restricted Stock and RSU Awards (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Service-based Restricted Stock Awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense $ 200 $ 200 $ 400 $ 400
Service-based Restricted Stock and RSU Awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
2020 412   412  
2021 797   797  
2022 760   760  
2023 516   516  
Total unrecognized expense $ 2,485   2,485  
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