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Debt - Additional Information (Detail)
1 Months Ended 12 Months Ended
Oct. 31, 2017
CAD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2019
CAD ($)
Dec. 31, 2018
CAD ($)
Disclosure Of Borrowings [Line Items]          
Long term debt outstanding   $ 32,389,000      
Debt payment terms   Each advance is to be repaid on a five-year, straight-line amortization of principal, repaid in monthly installments of principal plus interest at an interest rate of CA$ prime rate plus 200 basis points.      
Line of credit outstanding   $ 106,000 $ 138,000    
Amounts drawn on facility $ 250,000        
Weighted average interest rate   6.20% 6.90% 6.20% 6.90%
Prime Rate [Member]          
Disclosure Of Borrowings [Line Items]          
Basis on variable rate   CA$ prime rate plus 200 basis points      
Basis spread on variable rate   2.00%      
Accounts Payable And Accrued Liabilities [Member]          
Disclosure Of Borrowings [Line Items]          
Accrued interest payable   $ 162,000 $ 184,000    
Revolving Operating Loan [Member]          
Disclosure Of Borrowings [Line Items]          
Maximum borrowing capacity   13,000   $ 13,000  
Line of credit outstanding   150,000     $ 38,000
Amounts drawn on facility     2,000,000    
Securities pledged as collateral   24,915,000 $ 36,248,000    
Non-Revolving Variable Rate Term Loan 2021 [Member] | FCC Loan [Member]          
Disclosure Of Borrowings [Line Items]          
Long term debt outstanding   $ 31,306,000      
Debt payment terms   The outstanding balance is repayable by way of monthly installments of principal and interest      
Debt term   15 years      
Debt interest rate   6.391% 7.082% 6.391% 7.082%
Securities pledged as collateral   $ 155,548,000 $ 101,537,000    
Non-Revolving Fixed Rate Loan 2023 [Member]          
Disclosure Of Borrowings [Line Items]          
Debt interest rate   4.98%   4.98%  
Maximum borrowing capacity       $ 3,000,000  
Line of credit outstanding   $ 1,066,000 $ 1,279,000    
Uncommitted Non-Revolving Credit Facility 2023 [Member]          
Disclosure Of Borrowings [Line Items]          
Maximum borrowing capacity       700  
Uncommitted Non-Revolving Credit Facility 2023 [Member] | Letters Of Guarantee [Member]          
Disclosure Of Borrowings [Line Items]          
Debt term   365 days      
Maximum borrowing capacity       $ 300