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EQUITY AND STOCK COMPENSATION PLANS - Summarizes of stock options outstanding (Details) - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
EQUITY AND STOCK COMPENSATION PLANS      
Options outstanding, Number 435,000    
Options outstanding, Weighted average exercise price $ 6.00    
Options outstanding, Weighted average remaining contractual term (in years) 9 years 9 months 3 days    
Options exercisable, Number 16,248    
Options exercisable, Weighted average exercise price $ 6.00    
Exercise price range $4 to $5      
EQUITY AND STOCK COMPENSATION PLANS      
Options outstanding, Number 108,750    
Options outstanding, Weighted average exercise price $ 4.50    
Options outstanding, Weighted average remaining contractual term (in years) 9 years 9 months 3 days    
Options exercisable, Number 4,062    
Options exercisable, Weighted average exercise price $ 4.50    
Exercise price range $5 to $6      
EQUITY AND STOCK COMPENSATION PLANS      
Options outstanding, Number 108,750    
Options outstanding, Weighted average exercise price $ 5.50    
Options outstanding, Weighted average remaining contractual term (in years) 9 years 9 months 3 days    
Options exercisable, Number 4,062    
Options exercisable, Weighted average exercise price $ 5.50    
Exercise price range $6 to $7      
EQUITY AND STOCK COMPENSATION PLANS      
Options outstanding, Number 108,750    
Options outstanding, Weighted average exercise price $ 6.50    
Options outstanding, Weighted average remaining contractual term (in years) 9 years 9 months 3 days    
Options exercisable, Number 4,062    
Options exercisable, Weighted average exercise price $ 6.50    
Stock Option [Member]      
EQUITY AND STOCK COMPENSATION PLANS      
Options outstanding, Number 435,000 18,000 28,000
Options outstanding, Weighted average exercise price $ 6.00 $ 2.52 $ 2.97
Options exercisable, Number 16,248 18,000  
Options exercisable, Weighted average exercise price $ 6.00 $ 2.52  
Stock Option [Member] | Exercise price range $4 to $5      
EQUITY AND STOCK COMPENSATION PLANS      
Exercise price range (lower) 4    
Exercise price range (upper) 5    
Stock Option [Member] | Exercise price range $5 to $6      
EQUITY AND STOCK COMPENSATION PLANS      
Exercise price range (lower) 5    
Exercise price range (upper) 6    
Stock Option [Member] | Exercise price range $6 to $7      
EQUITY AND STOCK COMPENSATION PLANS      
Exercise price range (lower) 6    
Exercise price range (upper) 7    
Stock Option [Member] | Exercise price range $7 to $8      
EQUITY AND STOCK COMPENSATION PLANS      
Exercise price range (lower) 7    
Exercise price range (upper) $ 8    
Options outstanding, Number 108,750    
Options outstanding, Weighted average exercise price $ 7.50    
Options outstanding, Weighted average remaining contractual term (in years) 9 years 9 months 3 days    
Options exercisable, Number 4,062    
Options exercisable, Weighted average exercise price $ 7.50