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Financial Instruments - Financial Assets and Liabilities measured at Fair Value on a Recurring Basis (Detail) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Disclosure of fair value measurement of assets [line items]    
Short-term investments $ 3,773 $ 5,001
Long-term investments 126,117 24,056
Recurring fair value measurement [member]    
Disclosure of fair value measurement of assets [line items]    
Financial assets 127,389 24,056
Recurring fair value measurement [member] | Convertible Debt [member]    
Disclosure of fair value measurement of assets [line items]    
Short-term investments 1,272  
Long-term investments 105,004 904
Recurring fair value measurement [member] | Common Shares Held [member]    
Disclosure of fair value measurement of assets [line items]    
Long-term investments 19,025 21,486
Recurring fair value measurement [member] | Warrants and other [member]    
Disclosure of fair value measurement of assets [line items]    
Long-term investments 2,088 1,666
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member]    
Disclosure of fair value measurement of assets [line items]    
Financial assets 19,025 21,486
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Convertible Debt [member]    
Disclosure of fair value measurement of assets [line items]    
Short-term investments 0  
Long-term investments 0 0
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Common Shares Held [member]    
Disclosure of fair value measurement of assets [line items]    
Long-term investments 19,025 21,486
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Warrants and other [member]    
Disclosure of fair value measurement of assets [line items]    
Long-term investments 0 0
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member]    
Disclosure of fair value measurement of assets [line items]    
Financial assets 108,364 2,570
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Convertible Debt [member]    
Disclosure of fair value measurement of assets [line items]    
Short-term investments 1,272  
Long-term investments 105,004 904
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Common Shares Held [member]    
Disclosure of fair value measurement of assets [line items]    
Long-term investments 0 0
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Warrants and other [member]    
Disclosure of fair value measurement of assets [line items]    
Long-term investments 2,088 1,666
Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member]    
Disclosure of fair value measurement of assets [line items]    
Financial assets 0 0
Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Convertible Debt [member]    
Disclosure of fair value measurement of assets [line items]    
Short-term investments 0  
Long-term investments 0 0
Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Common Shares Held [member]    
Disclosure of fair value measurement of assets [line items]    
Long-term investments 0 0
Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Warrants and other [member]    
Disclosure of fair value measurement of assets [line items]    
Long-term investments $ 0 $ 0