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Bank Indebtedness - Additional Information (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2024
CAD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
CAD ($)
Dec. 31, 2023
USD ($)
Disclosure of detailed information about financial instruments [Line Items]        
Description of interest rate Advances under the $40 million facility are available at the bank’s prime lending rate, U.S. base rate, U.S. SOFR rate plus applicable margin, or applicable margin for Banker’s Acceptances, or in combination, and under the US$15 million facility at the bank’s prime lending rate.      
40.0 Million Secured Operating Facilities [Member]        
Disclosure of detailed information about financial instruments [Line Items]        
Line of credit borrowing capacity $ 40,000,000   $ 40,000,000  
Line of credit outstanding 0   0  
Letters of credit outstanding 9,000,000   20,000,000  
15.0 Million Secured Operating Facilities [Member]        
Disclosure of detailed information about financial instruments [Line Items]        
Line of credit borrowing capacity   $ 15   $ 15
Line of credit outstanding 0   0  
40.0 Million Operating Facilities [member]        
Disclosure of detailed information about financial instruments [Line Items]        
Line of credit borrowing capacity   40   40
Line of credit outstanding $ 0   $ 0  
Letters of credit outstanding   $ 23   $ 28