Post-effective amendment to a registration statement that is not immediately effective upon filing

COMMON STOCK OPTIONS AND WARRANTS (Schedule of activity of warrants) (Details)

v3.20.2
COMMON STOCK OPTIONS AND WARRANTS (Schedule of activity of warrants) (Details) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Number of Warrants        
Outstanding at beginning of period 163,010 160,152    
Warrants expired, forfeited, cancelled or exercised (102,800)      
Outstanding at end of period 311,898 163,010 160,152  
Exercisable at end of period 162,474 145,857    
Weighted Average Exercise Price        
Outstanding at beginning of period $ 14.00 $ 14.00    
Outstanding at end of period 5.46 14.00 $ 14.00  
Exercisable at end of period $ 6.08 $ 14.00    
Remaining Average Remaining Contractual Term (Years)        
Outstanding at end of period 4 years 8 months 12 days 3 years 4 months 24 days    
Exercisable at end of period 4 years 8 months 12 days 3 years 4 months 24 days    
Warrant [Member]        
Number of Warrants        
Outstanding at beginning of period 1,521,250 1,815,181 1,801,166  
Warrants expired, forfeited, cancelled or exercised   (338,575) (21,429)  
Warrants issued   44,644 35,444  
Outstanding at end of period   1,521,250 1,815,181  
Exercisable at end of period   1,521,250    
Weighted Average Exercise Price        
Outstanding at beginning of period $ 8.78 $ 9.52 $ 9.10  
Warrants issued   7.70 9.10  
Outstanding at end of period   8.78 $ 9.52  
Exercisable at end of period   $ 8.78    
Remaining Average Remaining Contractual Term (Years)        
Outstanding at the beginning of the year     4 years 10 months 25 days  
Warrant issued   4 years 10 months 25 days 4 years 10 months 25 days  
Outstanding at end of period   3 years 10 months 25 days 3 years 10 months 25 days  
Exercisable at end of period   2 years 9 months 18 days    
Aggregate Intrinsic Value        
Outstanding  
Exercisable