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Warrants (Tables)
12 Months Ended
Dec. 31, 2020
Warrants and Rights Note Disclosure [Abstract]  
Summary of Warrant Activity

Following is a summary of all warrant activity for the two years ended December 31, 2020:

 

Warrants  

Number of

Warrants

Issued

   

Weighted

Average

Exercise

Price

 
Warrants outstanding at January 1, 2019     1,593,162     $ 5.36  
Warrants issued during 2019 (see Note 12)     200,000     $ 0.01  
Warrants expired during 2019     (1,167,064 )   $ 6.32  
Warrants outstanding at December 31, 2019     626,098     $ 1.87  
Warrants issued during 2020     3,522,525     $ 1.21  
Warrants exercised during 2020 (see Note 12)     (200,000 )   $ 0.01  
Warrants cancelled during 2020     (95,057 )   $ 2.63  
Warrants outstanding and exercisable at December 31, 2020     3,853,566     $ 1.35  
                 
Aggregate intrinsic value of outstanding warrants at December 31, 2020   $ -0-          
                 
Weighted average remaining contractual terms (years)     4.8