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EQUITY AND STOCK COMPENSATION PLANS - Summary of stock option transactions (Details) - $ / shares
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Shares    
Outstanding at end of year 435,000  
Exercisable at year end 16,248  
Weighted Average Exercise Price    
Outstanding at end of year $ 6.00  
Exercisable at year end $ 6.00  
Stock Option [Member]    
Shares    
Outstanding at beginning of year 18,000 28,000
Number of stock options granted 435,000 0
Exercised 18,000 0
Forfeited or cancelled 0 (10,000)
Outstanding at end of year 435,000 18,000
Exercisable at year end 16,248 18,000
Weighted Average Exercise Price    
Outstanding at beginning of year $ 2.52 $ 2.97
Granted 6.00 0.00
Exercised 2.52 0.00
Forfeited or cancelled 0.00 3.77
Outstanding at end of year 6.00 2.52
Exercisable at year end $ 6.00 $ 2.52