Note 3 - Investment Management and Other Fees (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Jun. 30, 2024
Accounts Receivable, Allowance for Credit Loss	$ 0		$ 0		$ 0
Fund Clients [Member]
Receivables, Net, Current	759,000		759,000		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	39,000	$ 43,000	$ 78,000	$ 78,000
U S Global E T Fs [Member] | Fund Clients [Member]
Receivables, Net, Current	642,000		$ 642,000		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	$ 304,000	$ 192,000	$ 532,000	$ 445,000
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	$ 117,000		$ 117,000		$ 125,000