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Share Option and Warrant Reserves (Details 3)
 12 Months Ended
Dec. 31, 2021
$ / shares
Dec. 31, 2020
$ / shares
Dec. 31, 2019
$ / shares
Statement [Line Items]      
Number of share options outstanding beginning of the year 6,751,997 8,141,004 5,602,619
Weighted average exercise price outstanding beginning of the year $ 2.00 $ 2.67 $ 2.96
Options outstanding, remaining contractual life 2 years 5 months 12 days    
Number of options exercisable 4,945,125    
Options exercisable, exercise price $ 2.21    
Options exercisable, remaining contractual life 2 years 8 months 19 days    
Exercise Price Range 1      
Statement [Line Items]      
Number of share options outstanding beginning of the year 2,934,405    
Weighted average exercise price outstanding beginning of the year $ 1.28    
Options outstanding, remaining contractual life 1 year 6 months 29 days    
Number of options exercisable 1,826,282    
Options exercisable, exercise price $ 1.44    
Options exercisable, remaining contractual life 2 years 3 months 18 days    
Exercise Price Range 2      
Statement [Line Items]      
Number of share options outstanding beginning of the year 3,686,324    
Weighted average exercise price outstanding beginning of the year $ 2.35    
Options outstanding, remaining contractual life 3 years 2 months 19 days    
Number of options exercisable 2,987,575    
Options exercisable, exercise price $ 2.42    
Options exercisable, remaining contractual life 3 years 29 days    
Exercise Price Range 3      
Statement [Line Items]      
Number of share options outstanding beginning of the year 131,268    
Weighted average exercise price outstanding beginning of the year $ 7.88    
Options outstanding, remaining contractual life 4 months 28 days    
Number of options exercisable 131,268    
Options exercisable, exercise price $ 7.88    
Options exercisable, remaining contractual life 4 months 28 days