v3.26.1
Financial Highlights Per Share Performance - Summary of Per Share Data (Details) - $ / shares
3 Months Ended 9 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Per Share Data:        
Principal Market NAV, beginning of period $ 4.92 $ 3.67 $ 4.31 $ 3.34
Net decrease in net assets from investment operations:        
Net investment loss (0.03) (0.02) (0.08) (0.06)
Net realized and unrealized loss (1.05) (1.12) (0.39) (0.75)
Net decrease in net assets resulting from operations (1.08) (1.14) (0.47) (0.81)
Principal Market NAV, end of period $ 3.84 $ 2.53 $ 3.84 $ 2.53
Total return (21.95%) (31.06%) (10.90%) (24.25%)
Ratios to average net assets:        
Net investment loss 2.50% 2.50% 2.50% 2.50%
Expenses (2.50%) (2.50%) (2.50%) (2.50%)