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Note 5 - Investment Management and Other Fees (Details Textual) - USD ($) | 12 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022
Investment Advisory Fees, Fee Adjustment Percent, Minimum Performance to Designed Benchmark Over Prior Rolling 12 Months | 5.00% |
Fund Clients [Member] |  |
Receivables, Net, Current | $ 1,100,000 | $ 1,600,000
U S Global Investors Funds [Member] |  |
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% |
Aggregate Fees Waived and Expenses Borne | $ 1,100,000 | 667,000
Annual Administrative Fee Rate | 0.05% |
U S Global Investors Funds [Member] | Fund Clients [Member] |  |
Receivables, Net, Current | $ 126,000 | 188,000
U S Global E T Fs [Member] |  |
Aggregate Fees Waived and Expenses Borne | $ 105,000 | 69,000
Unitary Management Fee, Percentage of Average Net Assets | 0.60% |
U S Global E T Fs [Member] | Fund Clients [Member] |  |
Receivables, Net, Current | $ 1,000,000 | $ 1,400,000
U S Global Jets U C I T S E T F [Member] |  |
Unitary Management Fee, Percentage of Average Net Assets | 0.65% |

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- Definition Percent minimum performance to designed benchmark over prior rolling 12 months. + References No definition available. + Details
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- Definition The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481372/852-10-55-10 + Details
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