Note 2 - Significant Accounting Policies - Summary of Investments at Fair Value (Details) - USD ($) $ in Thousands |
Mar. 31, 2025 |
Sep. 30, 2024 |
|---|---|---|
| Fair Value, Inputs, Level 1 [Member] | ||
| Investment in Gold | $ 93,337,268 | $ 73,727,700 |
| Fair Value, Inputs, Level 2 [Member] | ||
| Investment in Gold | 0 | 0 |
| Fair Value, Inputs, Level 3 [Member] | ||
| Investment in Gold | 0 | 0 |
| Investment in Gold [Member] | Fair Value, Inputs, Level 1 [Member] | ||
| Investment in Gold | 93,337,268 | 73,727,700 |
| Investment in Gold [Member] | Fair Value, Inputs, Level 2 [Member] | ||
| Investment in Gold | 0 | 0 |
| Investment in Gold [Member] | Fair Value, Inputs, Level 3 [Member] | ||
| Investment in Gold | $ 0 | $ 0 |