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Note 3 - Investment Management and Other Fees (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2025 | Mar. 31, 2024 | Jun. 30, 2024
Accounts Receivable, Allowance for Credit Loss | $ 0 |  | $ 0 |  | $ 0
Fund Clients [Member] |  |  |  |  |
Receivables, Net, Current | 665,000 |  | 665,000 |  | 772,000
Accounts Receivable, Allowance for Credit Loss | 0 |  | $ 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 | 33,000 | $ 37,000 | $ 111,000 | $ 115,000 |
U S Global E T Fs [Member] | Fund Clients [Member] |  |  |  |  |
Receivables, Net, Current | 541,000 |  | $ 541,000 |  | 647,000
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 | $ 211,000 | $ 193,000 | $ 743,000 | $ 638,000 |
Investment Advisory Fees, Fee Adjustment Base Percentage Adjustment When Fund Performance is Not Within Limits to Benchmark Index | 0.25% |  | 0.25% |  |
Investment Advisory Fees, Fee Adjustment Percent, Minimum Performance to Designed Benchmark Over Prior Rolling 12 Months | 5.00% |  | 5.00% |  |
Annual Administrative Fee Rate |  |  | 0.05% |  |
U S Global Investors Funds [Member] | Fund Clients [Member] |  |  |  |  |
Receivables, Net, Current | $ 124,000 |  | $ 124,000 |  | $ 125,000

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