Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION (Stock Options Outstanding and Exercisable) (Details)

v3.20.1
STOCK-BASED COMPENSATION (Stock Options Outstanding and Exercisable) (Details) - Common stock options - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding Number of Options 1,216,765 1,340,252
Weighted Average Remaining Life In Years 5 years 7 months 6 days 6 years 4 months 13 days
Exercisable Number of Options 1,011,394 989,092
$1.52 – $3.15    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding Number of Options 280,435  
Weighted Average Remaining Life In Years 5 years 8 months 16 days  
Exercisable Number of Options 182,476  
$1.52 – $3.15 | Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price range (in dollars per share) $ 1.52  
$1.52 – $3.15 | Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price range (in dollars per share) $ 3.15  
$3.25 – $4.92    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding Number of Options 538,780  
Weighted Average Remaining Life In Years 6 years 2 months 12 days  
Exercisable Number of Options 462,564  
$3.25 – $4.92 | Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price range (in dollars per share) $ 3.25  
$3.25 – $4.92 | Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price range (in dollars per share) $ 4.92  
$5.01 – $6.00    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding Number of Options 237,250  
Weighted Average Remaining Life In Years 4 years 8 months 1 day  
Exercisable Number of Options 219,161  
$5.01 – $6.00 | Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price range (in dollars per share) $ 5.01  
$5.01 – $6.00 | Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price range (in dollars per share) $ 6.0  
$6.18 – $7.20    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding Number of Options 70,000  
Weighted Average Remaining Life In Years 5 years 7 days  
Exercisable Number of Options 61,259  
$6.18 – $7.20 | Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price range (in dollars per share) $ 6.18  
$6.18 – $7.20 | Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price range (in dollars per share) $ 7.20  
$7.54 – $7.80    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding Number of Options 67,800  
Weighted Average Remaining Life In Years 4 years 11 months 27 days  
Exercisable Number of Options 63,434  
$7.54 – $7.80 | Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price range (in dollars per share) $ 7.54  
$7.54 – $7.80 | Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price range (in dollars per share) $ 7.80  
$8.06 – $12.98    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding Number of Options 22,500  
Weighted Average Remaining Life In Years 4 years 9 months 18 days  
Exercisable Number of Options 22,500  
$8.06 – $12.98 | Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price range (in dollars per share) $ 8.06  
$8.06 – $12.98 | Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price range (in dollars per share) $ 12.98