Note 3 - Investment Management and Other Fees (Details Textual) - USD ($)	3 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2024
Accounts Receivable, Allowance for Credit Loss	$ 0		$ 0
Fund Clients [Member]
Receivables, Net, Current	701,000		772,000
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	$ 39,000	$ 35,000
U S Global E T Fs [Member] | Fund Clients [Member]
Receivables, Net, Current	$ 597,000		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	$ 228,000	$ 253,000
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	$ 104,000		$ 125,000