Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION (Stock Option Award Activity) (Details)

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STOCK-BASED COMPENSATION (Stock Option Award Activity) (Details) - Common stock options - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Number of Options outstanding      
Outstanding at the beginning of the year (in shares) 1,340,252    
Granted (in shares) 10,000 40,000  
Exercised (in shares) 0    
Forfeited (in shares) (133,487)    
Outstanding at the end of the reporting period (in shares) 1,216,765   1,340,252
Number of Options Exercisable      
Exercisable at the beginning of the year (in shares) 989,092    
Vested (in shares) (49,618)    
Forfeited (in shares) (27,316)    
Exercisable at the end of the reporting period (in shares) 1,011,394   989,092
Weighted Average Exercise Price Outstanding      
Outstanding at the beginning of period (in dollars per share) $ 4.57    
Granted (in dollars per share) 1.74    
Exercised (in dollars per share) 0.00    
Forfeited (in dollars per share) 4.29    
Outstanding at the end of the reporting period (in dollars per share) 4.57   $ 4.57
Weighted Average Exercise Price Exercisable      
Exercisable at the beginning of the reporting period (in dollars per share) 4.85    
Vested exercisable (in dollars per share) 3.49    
Forfeited (in dollars per share) 5.69    
Exercisable at the end of the reporting period (in dollars per share) 4.76   4.85
Weighted Average Grant Date Fair Value Outstanding      
Outstanding at the beginning of the reporting period (in dollars per share) 2.88    
Granted (in dollars per share) 1.16    
Exercised (in dollars per share) 0.00    
Forfeited (in dollars per share) 2.84    
Outstanding at the end of the reporting period (in dollars per share) 2.87   2.88
Weighted Average Grant Date Fair Value Exercisable      
Exercisable at the beginning of the reporting period (in dollars per share) 3.03    
Vested options exercisable (in dollars per share) 2.22    
Exercised options exercisable (in dollars per share) 0.00    
Forfeited options exercisable (in dollars per share) 3.69    
Exercisable at the end of the reporting period (in dollars per share) $ 2.97   $ 3.03
Weighted Average Remaining Life In Years Outstanding      
Outstanding Weighted Average Remaining Life (in years) 6 years 1 month 2 days   6 years 11 months 12 days
Granted (in years) 9 years 10 months 13 days    
Weighted Average Remaining Life Exercisable      
Weighted Average Remaining Life In Years 5 years 7 months 6 days   6 years 4 months 13 days
Granted (in years) 5 years 15 days