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Summary of Significant Accounting Policies (Tables)
3 Months Ended
Mar. 31, 2022
Accounting Policies [Abstract]  
Schedule of common shares due to their antidilutive effect
   Three months ended
March 31
 
   2022   2021 
         
Stock options   4,217    3,982 
Warrants   841    929 
Convertible debt   2,099    2,060 
    7,157    6,971