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Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2023
Share-based Payment Arrangement [Abstract]  
Schedule of stock option activity [Table Text Block]
          Weighted-  
          average grant-  
    EBITDA PSUs     date fair value  
Non-vested, beginning of period   2,355,431   $ 4.80  
Granted   1,109,309     6.99  
Vested   (2,299,700 )   4.78  
Cancelled   (70,193 )   6.48  
Non-vested, end of period   1,094,847   $ 6.95  
Schedule of share-based payment award, stock options, valuation assumptions [Table Text Block]
    TSR PSUs     Stock options  
Grant-date stock price $ 6.35   $ 6.35  
Exercise price   NA   $ 6.35  
Dividend yield   0%     0%  
Expected volatility(a)   55.5%     63.2%  
Risk-free interest rate(b)   4.7%     4.2%  
Expected life (in years)(c)   2.5     6.0  

(a) Determined based on the historical volatility of the Common Shares over the performance period of the PSUs and expected life of the stock options.

(b) Determined based on U.S. Treasury yields with a remaining term equal to the performance period of the PSUs and expected life of the stock options.

(c) Determined based on the performance period of the PSUs and the mid-point of vesting (three years) and expiration (ten years) for the stock options.