Trading Activities - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2020 USD ($) Contract	Mar. 31, 2019 USD ($) Contract
Futures Contracts [Member]
Derivative [Line Items]
Average number of derivative contracts traded	2,071	2,726
Forward Contracts [Member] | Commodity [Member] | Metals [Member]
Derivative [Line Items]
Average number of derivative contracts traded	397	386
Forward Contracts [Member] | Currencies [Member]
Derivative [Line Items]
Average notional value of derivative | $	$ 60,340,987	$ 74,118,889