Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Short-term investment maturity period			3 months
Weighted average number of common shares outstanding	19,482,118	13,273,241	16,569,240	12,971,591
Exploration License Impairments	$ 0	$ 0	$ 0	$ 0
Fair Value, Recurring [Member]
Property, Plant and Equipment [Line Items]
Fair value, net asset (liability)	$ 0		$ 0		$ 0
Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, estimated useful life			3 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, estimated useful life			30 years