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Note 3 - Investment Management and Other Fees (Details Textual) - USD ($) | 3 Months Ended |
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Jun. 30, 2025
Accounts Receivable, Allowance for Credit Loss | $ 0 |  | $ 0
Fund Clients [Member] |  |  |
Receivables, Net, Current | 765,000 |  | 683,000
Accounts Receivable, Allowance for Credit Loss | $ 0 |  | 0
U S Global E T Fs [Member] |  |  |
Unitary Management Fee, Percentage of Average Net Assets | 0.60% |  |
Aggregate Fees Waived and Expenses Borne | $ 35,000 | $ 39,000 |
Investment Company, Contractual and Voluntary Fees Waived | 14,000 | 10,000 |
U S Global E T Fs [Member] | Fund Clients [Member] |  |  |
Receivables, Net, Current | $ 514,000 |  | 494,000
U S Global Jets U C I T S E T F [Member] |  |  |
Unitary Management Fee, Percentage of Average Net Assets | 0.69% |  |
U S Global Investors Funds [Member] |  |  |
Aggregate Fees Waived and Expenses Borne | $ 226,000 | 228,000 |
Investment Company, Contractual and Voluntary Fees Waived | $ 170,000 | $ 183,000 |
Investment Advisory Fees, Fee Adjustment Base Percentage Adjustment When Fund Performance is Not Within Limits to Benchmark Index | 0.25% |  |
Investment Advisory Fees, Fee Adjustment Percent, Minimum Performance to Designed Benchmark Over Prior Rolling 12 Months | 5.00% |  |
Annual Administrative Fee Rate | 0.05% |  |
U S Global Investors Funds [Member] | Fund Clients [Member] |  |  |
Receivables, Net, Current | $ 251,000 |  | $ 189,000

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