Quarterly report pursuant to Section 13 or 15(d)

Share Capital - Summary of Assumptions Used To Record Fair Value of Warrants (Detail)

v3.21.2
Share Capital - Summary of Assumptions Used To Record Fair Value of Warrants (Detail) - Warrants [Member]
Jun. 30, 2021
Dec. 31, 2020
Risk-free interest rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants and rights outstanding, measurement input 0.4 0.2
Expected dividend yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants and rights outstanding, measurement input 0.0 0.0
Expected voltility | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants and rights outstanding, measurement input 203.0 251.1
Expected voltility | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants and rights outstanding, measurement input 88.9 148.0