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STOCK-BASED COMPENSATION (Details Narrative) - USD ($)
1 Months Ended 6 Months Ended
Apr. 02, 2019
Feb. 12, 2019
Mar. 22, 2018
Jun. 30, 2019
Apr. 30, 2019
Jan. 31, 2019
Mar. 31, 2018
Jan. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
Restricted Stock Units (RSUs) [Member] | Board of Directors [Member]                    
Restricted stock units granted       2,725 6,677 75,353   58,578    
Vesting period         1 year 1 year   1 year    
Stock awards forfeited (shares)       7,326            
Stock forfeited       $ 47,000            
Restricted Stock Units (RSUs) [Member] | Board of Directors [Member] | April 2019 Awards [Member]                    
Stock-based compensation                 $ 15,000  
Restricted Stock Units (RSUs) [Member] | Board of Directors [Member] | June 2019 Awards [Member]                    
Stock-based compensation                 7,000  
Restricted Stock Units (RSUs) [Member] | Board of Directors [Member] | Selling, General and Administrative Expenses [Member]                    
Stock-based compensation                 380,000 $ 415,000
Stock Awards [Member] | Employees [Member]                    
Number of common shares granted             68,764 5,130    
Number of shares returned for employee's withholding taxes (shares) 9,806 1,221 7,552              
Value of shares returned for employee's withholding taxes $ 64,000 $ 7,893 $ 62,000              
Stock Awards [Member] | Employees [Member] | Tranche One [Member]                    
Number of common shares granted         4,950          
Stock Awards [Member] | Employees [Member] | Tranche Two [Member]                    
Number of common shares granted         94,972          
Stock Awards [Member] | Awards in 2016 [Member] | Employees [Member]                    
Stock awards forfeited (shares)         11,193   12,330      
Stock Awards [Member] | Awards in 2017 [Member] | Employees [Member]                    
Stock awards forfeited (shares)         8,299   9,130      
Stock Awards [Member] | Awards in 2018 [Member] | Employees [Member]                    
Stock awards forfeited (shares)         8,593          
Stock Awards [Member] | Selling, General and Administrative Expenses [Member] | Employees [Member]                    
Stock-based compensation                   10,000
Stock Awards [Member] | Selling, General and Administrative Expenses [Member] | April 2019 Awards [Member] | Employees [Member] | Tranche One [Member]                    
Stock-based compensation                 6,000  
Stock Awards [Member] | Selling, General and Administrative Expenses [Member] | April 2019 Awards [Member] | Employees [Member] | Tranche Two [Member]                    
Stock-based compensation                 69,000  
Stock Awards [Member] | Selling, General and Administrative Expenses [Member] | March 2018 Awards [Member] | Employees [Member]                    
Stock-based compensation                 140,000  
Stock Awards [Member] | Cost of Sales [Member] | Employees [Member]                    
Stock-based compensation                   $ 36,000
Stock Awards [Member] | Cost of Sales [Member] | April 2019 Awards [Member] | Employees [Member] | Tranche One [Member]                    
Stock-based compensation                 26,000  
Stock Awards [Member] | Cost of Sales [Member] | April 2019 Awards [Member] | Employees [Member] | Tranche Two [Member]                    
Stock-based compensation                 21,000  
Stock Awards [Member] | Cost of Sales [Member] | March 2018 Awards [Member] | Employees [Member]                    
Stock-based compensation                 $ 27,000  
Stock Option Plans [Member]                    
Stock options exercised                 35,000  
Fair value of shares on exercise date                 $ 231,003  
Shares received in exercise of options for exchange (shares)                 34,478