Statements of Financial Condition (Unaudited) (Parenthetical) - USD ($) |
Jun. 30, 2020 |
Dec. 31, 2019 |
---|---|---|
Investments in Securities, cost | $ 101,267,073 | $ 113,645,878 |
US Treasury Bill Securities [Member] | ||
Investments in Securities, cost | 39,995,308 | 55,776,919 |
Affiliated Investments [Member] | ||
Affiliated Investments, at Cost | $ 61,271,765 | $ 57,868,959 |