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BASIC AND DILUTED LOSS PER COMMON SHARE
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Basic and Diluted Loss Per Common Share BASIC AND DILUTED INCOME (LOSS) PER COMMON SHARE
The following is a reconciliation of weighted average Common Shares outstanding for the years ended December 31, 2021, 2020, 2019, respectively:
Years ended December 31,
202120202019
Issued shares at beginning of period 134,311,033 100,735,889 91,445,066 
  Effect of stock options exercised474,072 12,934 45,040 
  Effect of shares issued for settlement of vesting of restricted stock units443,364 452,932 786,746 
  Effect of shares issued for settlement of exercises of stock appreciation rights2,316 — — 
  Effect of shares issued for exercise of share purchase warrants1,737,981 — 1,057 
  Shares issued for consulting services35,933 74,672 46,067 
  Effect of shares issued to settle liabilities— — 141,525 
  Effect of shares issued in public offerings9,899,825 19,891,709 3,199,866 
Weighted average common shares outstanding146,904,524 121,168,136 95,665,367 

Basic and diluted income (loss) per common share
The calculation of basic and diluted income (loss) per share after adjustment for the effects of all potential dilutive Common Shares, calculated as follows:
 Years ended December 31,
 202120202019
Net income (loss) attributable to owners of the Company$1,541 $(27,776)$(37,978)
Basic weighted average common shares outstanding146,904,524 121,168,136 95,665,367 
  Dilutive impact of stock options, restricted stock units, and warrants2,816,593 — — 
Diluted weighted average common shares outstanding 149,721,117 121,168,136 95,665,367 
Basic net income (loss) per common share$0.01 $(0.23)$(0.40)
Diluted net income (loss) per common share$0.01 $(0.23)$(0.40)
For the three years ended December 31, 2021, 2020 and 2019, 0.06 million, 6.87 million and 6.97 million stock options, restricted stock units, and warrants, respectively, and the potential conversion of the Convertible Debentures have been excluded from the calculation of diluted net income (loss) per common share as their effect would have been anti-dilutive. In addition, the Company excluded stock appreciation rights of 1.67 million, 1.72 million, and 2.17 million for the three years ended December 31, 2021, 2020, and 2019, respectively as they are contingently issuable based on specified market prices of the Company’s stock which were not achieved as of the end of each period.