Condensed Statements of Financial Condition (Parenthetical) - USD ($)	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Condensed Statements of Financial Condition
Cash and cash equivalents (at cost $41,994,224 and $72,554,979, respectively) (Notes 2 and 5)	$ 41,994,224	$ 72,554,979	$ 70,906,110
Cash and cash equivalents (at cost $30,838,201 and $7,167,433, respectively)	$ 30,838,201	$ 7,167,433	$ 10,385,090