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Statements of Changes in Net Assets (Unaudited) (Parenthetical) - shares
3 Months Ended 9 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2022
Mar. 31, 2021
Statement of Stockholders' Equity [Abstract]        
Creation of shares 3,850,000 3,350,000 7,400,000 15,800,000
Redemption of shares 0 2,650,000 10,700,000 15,150,000