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Share Capital - Summary of Weighted Average Assumptions Used to Estimate Fair Value of Stock Options Granted (Detail)
12 Months Ended
Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Expected life of options 5 years 18 days
Risk-free interest rate 1.61%
Dividend yield 0.00%
Volatility 63.00%
Pre-vest forfeiture rate 3.67%