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SHAREHOLDERS EQUITY - Stock based compensation - Financial Performance Units (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
May 01, 2020
May 01, 2019
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted (in shares)           62,569
Unrecognized compensation expense     $ 0.6   $ 0.6  
Financial Performance Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Service period (in years)   5 years        
Granted (in shares)         60,859  
Financial Performance Units Granted Prior to 2019            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Service period (in years)         2 years  
Percent of awards accruing at maximum threshold           50.00%
Remainder threshold awards           100.00%
Maximum number of shares can be issued     10,000   10,000  
Unrecognized compensation expense     $ 0.1   $ 0.1  
Unrecognized compensation expense recognition period (in years)         1 year 3 months 18 days  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition         1 year 3 months 18 days  
Financial Performance Units Granted Prior to 2019 | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Financial performance threshold percentage         150.00%  
Financial Performance Units Granted Prior to 2019 | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Financial performance threshold percentage         0.00%  
Financial Performance Units Granted in 2019            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Service period (in years)   2 years        
Granted (in shares)         1,866  
Maximum percentage of shares can be issued         150.00%  
Financial Performance Units Granted in 2019 | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Financial performance threshold percentage   150.00%        
Financial Performance Units Granted in 2019 | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Financial performance threshold percentage   0.00%        
Financial Performance Units Granted From May 1, 2019 Through April 30, 2020            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Maximum number of shares can be issued     86,200   86,200  
Stock-based compensation expense     $ 0.1 $ 0.1    
Financial Performance Units Grante From May 1, 2020 Through June 30, 2020            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted (in shares)     699      
Financial Performance Units Granted from May 1, 2020 through June 30, 2020            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Service period (in years) 5 years          
Granted (in shares)         58,993  
Maximum percentage of shares can be issued         150.00%  
Maximum number of shares can be issued     87,900   87,900  
Stock-based compensation expense     $ 0.1   $ 0.1  
Unrecognized compensation expense     $ 0.7   $ 0.7  
Unrecognized compensation expense recognition period (in years)         4 years 3 months 18 days  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition         4 years 3 months 18 days  
Financial Performance Units Granted from May 1, 2020 through June 30, 2020 | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Financial performance threshold percentage 150.00%          
Financial Performance Units Granted from May 1, 2020 through June 30, 2020 | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Financial performance threshold percentage 0.00%          
Financial Performance Units Granted In 2020 [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Service period (in years) 2 years