Annual report pursuant to Section 13 and 15(d)

Income Tax - Reconciliation of Income Tax Attributable to Operations (Detail)

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Income Tax - Reconciliation of Income Tax Attributable to Operations (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Tax Disclosure [Abstract]      
Income tax recovery at statutory rates (at a rate of 21% for all years presented) $ (8,894) $ (6,962) $ (3,094)
Expenses not deducted for tax purposes 299 224 118
Effect of tax rate changes on deferred tax assets and liabilities (18) 17 34
Rate differential on foreign earnings (26) (77) (103)
Research and development tax credits (1,154) (134) (23)
Change in valuation allowance 10,464 7,544 3,662
Reassessment of previously recognized net operating losses 9 (620)  
Adjustment to prior year research and development tax credits (731)    
Other $ 51 $ 8 $ (594)