Note 4 - Investment Management and Other Fees (Details Textual) - USD ($)	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
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	884,000	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	$ 124,000	143,000
Investment Company, Contractual and Voluntary Fees Waived	63,000	39,000
U S Global E T Fs [Member] | Fund Clients [Member]
Receivables, Net, Current	$ 556,000	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	$ 744,000	973,000
Investment Company, Contractual and Voluntary Fees Waived	$ 531,000	765,000
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	$ 328,000	$ 189,000