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STOCK-BASED COMPENSATION (Narrative) (Details) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Employee Stock Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Issued to employees   410,000
Employees' Stock-Based Compensation Plans [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares available for issuance 571,066  
Employees' Stock-Based Compensation Plans [Member] | Employee Stock Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares available for issuance 497,510  
Employees' Stock-Based Compensation Plans [Member] | Employee Stock Options or Shares    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares available for issuance 73,556  
Non-employee Directors' Stock-Based Compensation Plans [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares available for issuance 1,130,000  
Annual compensation $ 120,000  
Number of shares currently available for issuance 386,281  
Compensation paid in cash (as percentage) 50.00%  
Compensation paid in shares (as percentage) 50.00%  
Audit Committee Chair [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Additional Stock based Compensation $ 20,000  
Chairman of Board of Directors [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Additional Stock based Compensation 15,000  
Other Committee Chairs [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Additional Stock based Compensation $ 10,000