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SHAREHOLDERS' EQUITY (Narrative) (Details) - USD ($)
1 Months Ended 3 Months Ended
Mar. 15, 2021
Apr. 30, 2021
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Securities offerings, reserved for future issuance         $ 150,000,000.0
Stock options outstanding (in shares)     25,417    
Stock options outstanding, weighted average option exercise price (in dollars per share)     $ 4.01    
Granted (in shares)     171,576 210,272  
Public Stock Offering          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares issued in transaction (in shares) 3,500,000        
Sale of stock, price per share (in dollars per share) $ 4.75        
Gross consideration received $ 16,600,000        
Net proceeds received $ 15,100,000        
Public Stock Offering | Subsequent Event          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares issued in transaction (in shares)   100,650      
Net proceeds received   $ 400,000      
Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award requisite service period     1 year    
Granted (in shares)     171,576    
Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period     3 years    
Minimum | Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Ultimate expense range, percent of target     0.00%    
Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period     5 years    
Maximum | Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Ultimate expense range, percent of target     250.00%