Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY (Schedule of Activity of Warrants) (Details)

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STOCKHOLDERS' EQUITY (Schedule of Activity of Warrants) (Details) - $ / shares
 3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Number of Warrants    
Outstanding at beginning of period 163,010 160,152
Outstanding at end of period 163,010 163,010
Exercisable at end of period 158,724 154,438
Weighted Avg. Exercise Price    
Outstanding at beginning of period $ 14.00 $ 14.00
Outstanding at end of period 14.00 14.00
Exercisable at end of period $ 14.00 $ 14.00
Remaining Contractual Life (Years)    
Outstanding at end of period 3 years 1 month 6 days 3 years 4 months 24 days
Exercisable at end of period 3 years 1 month 6 days 3 years 4 months 24 days
Warrant [Member]    
Number of Warrants    
Outstanding at beginning of period 1,521,250 1,815,181
Warrants expired, forfeited, cancelled or exercised (338,575)
Warrants issued 67,500 44,644
Outstanding at end of period 1,588,750 1,521,250
Exercisable at end of period 1,588,750 1,521,250
Weighted Avg. Exercise Price    
Outstanding at beginning of period $ 8.78 $ 9.52
Warrants issued 9.00 7.70
Outstanding at end of period 8.79 8.78
Exercisable at end of period $ 8.41 $ 8.78
Remaining Contractual Life (Years)    
Outstanding at beginning of period 3 years 3 years 10 months 25 days
Warrants issued 4 years 10 months 25 days 4 years 10 months 25 days
Outstanding at end of period 2 years 8 months 12 days 2 years 9 months 18 days
Exercisable at end of period 2 years 8 months 12 days 2 years 9 months 18 days