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Note 5 - Investment Management and Other Fees (Details Textual) - USD ($) | 12 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023
Investment Advisory Fees, Fee Adjustment Percent, Minimum Performance to Designed Benchmark Over Prior Rolling 12 Months | 5.00% |
Accounts Receivable, Allowance for Credit Loss | $ 0 | $ 0
Fund Clients [Member] |  |
Receivables, Net, Current | 772,000 | 1,100,000
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 | $ 147,000 | 105,000
U S Global E T Fs [Member] | Fund Clients [Member] |  |
Receivables, Net, Current | $ 647,000 | 1,000,000
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 | $ 840,000 | 1,100,000
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 | $ 125,000 | $ 126,000

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