Share Purchases and Redemptions - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2021 CreationUnit shares
Equity [Abstract]
Minimum number of creation units that can be purchased | CreationUnit	1
Number of shares that can be purchased per Creation Unit | shares	100,000
Minimum number of Creation Units that can be redeemed | CreationUnit	1
Number of shares that can be redeemed per Creation Unit | shares	100,000