General form of registration statement for all companies including face-amount certificate companies

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

v3.21.1
COMMON STOCK OPTIONS AND WARRANTS (Schedule of activity of warrants) (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Number of Warrants        
Outstanding at the beginning of the year 451,898      
Warrants expired, forfeited, cancelled or exercised (102,800)      
Outstanding at end of period   451,898    
Weighted Average Exercise Price        
Warrants expired, forfeited, cancelled or exercised $ 14.00      
Warrant [Member]        
Number of Warrants        
Outstanding at the beginning of the year 1,587,333 1,521,250 1,815,181  
Warrants expired, forfeited, cancelled or exercised   (23,116) (338,575)  
Warrants issued   89,419 44,644  
Outstanding at end of period   1,587,333 1,521,250 1,815,181
Exercisable at end of period   1,587,333 1,521,250  
Weighted Average Exercise Price        
Outstanding at the beginning of the year $ 8.62 $ 8.78 $ 9.52  
Warrants issued   9.02 7.70  
Outstanding at end of period   8.62 8.78 $ 9.52
Exercisable at end of period   $ 8.69 $ 8.78  
Remaining Average Remaining Contractual Term (Years)        
Outstanding at the beginning of the year   3 years 10 months 25 days 3 years 10 months 25 days  
Warrant issued   2 years 2 months 12 days 4 years 10 months 25 days  
Outstanding at end of period   2 years 3 years 10 months 25 days  
Exercisable at end of period   2 years 3 years 10 months 25 days  
Aggregate Intrinsic Value        
Outstanding  
Exercisable