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STOCK-BASED COMPENSATION PLANS (Details)
3 Months Ended 9 Months Ended
Apr. 27, 2021
USD ($)
$ / shares
shares
Feb. 19, 2021
USD ($)
$ / shares
shares
Sep. 30, 2021
USD ($)
item
$ / shares
Sep. 30, 2020
USD ($)
$ / shares
Sep. 30, 2021
USD ($)
installment
item
$ / shares
Sep. 30, 2020
USD ($)
$ / shares
Dec. 31, 2020
USD ($)
Oct. 09, 2019
shares
STOCK-BASED COMPENSATION PLANS                
Total stock-based compensation expense (benefit)     $ 141,000 $ 25,000 $ 581,000 $ (40,000)    
Number of shares participant is entitled to receive | item     1   1      
Restricted Stock Units                
STOCK-BASED COMPENSATION PLANS                
Total stock-based compensation expense (benefit)     $ 153,000 $ 100,000 $ 415,000 $ 263,000    
Granted (in dollars per unit) | $ / shares     $ 15.72 $ 18.98    
Unrecognized compensation cost related to non-vested stock-based compensation agreements     $ 1,346,000   $ 1,346,000      
Weighted average remaining contractual term         2 years 2 months 12 days      
Restricted Stock Units | Key employees                
STOCK-BASED COMPENSATION PLANS                
Shares granted | shares 4,000 43,047            
Vesting period 4 years 3 years            
Fair value of units granted $ 72,000              
Granted (in dollars per unit) | $ / shares $ 17.93              
Restricted Stock Units | Non employee directors                
STOCK-BASED COMPENSATION PLANS                
Shares granted | shares   3,300            
Fair value of units granted   $ 720,000            
Granted (in dollars per unit) | $ / shares   $ 15.53            
Performance Shares                
STOCK-BASED COMPENSATION PLANS                
Total stock-based compensation expense (benefit)     75,000   $ 123,000      
Granted (in dollars per unit) | $ / shares         $ 15.53      
Unrecognized compensation cost related to non-vested stock-based compensation agreements     485,000   $ 485,000      
Weighted average remaining contractual term         2 years 4 months 24 days      
Performance Shares | Key employees                
STOCK-BASED COMPENSATION PLANS                
Shares granted | shares   28,697            
Vesting period   3 years            
Fair value of units granted   $ 405,000            
Granted (in dollars per unit) | $ / shares   $ 15.53            
Performance Shares | Minimum | Key employees                
STOCK-BASED COMPENSATION PLANS                
Percentage of the number of units granted that may be earned   0.00%            
Performance Shares | Maximum | Key employees                
STOCK-BASED COMPENSATION PLANS                
Percentage of the number of units granted that may be earned   150.00%            
Total awards classified as equity                
STOCK-BASED COMPENSATION PLANS                
Total stock-based compensation expense (benefit)     228,000 $ 100,000 $ 538,000 $ 263,000    
Stock Appreciation Rights                
STOCK-BASED COMPENSATION PLANS                
Total stock-based compensation expense (benefit)     (87,000) $ (75,000) 43,000 $ (303,000)    
Unrecognized compensation cost related to non-vested stock-based compensation agreements     41,000   $ 41,000      
Number of installments | installment         4      
Stock appreciation rights plan liability recorded for the outstanding units     302,000   $ 302,000   $ 272,000  
Stock appreciation rights plan liability recorded for the previously exercised units     $ 797,000   $ 797,000   $ 1,087,000  
Number of equal annual installments in which the liability recorded for previously exercised units will be paid | installment         3      
Omnibus Incentive Plan                
STOCK-BASED COMPENSATION PLANS                
Authorized number of shares | shares               1,820,000