Annual report pursuant to Section 13 and 15(d)

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

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COMMON STOCK OPTIONS AND WARRANTS (Schedule of activity of warrants) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Number of Warrants      
Outstanding at the beginning of the year 160,152    
Outstanding at end of period 163,010 160,152  
Warrant [Member]      
Number of Warrants      
Outstanding at the beginning of the year 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 the beginning of the year $ 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