Note 4 - Investment Management and Other Fees (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2023	Jun. 30, 2023
Accounts Receivable, Allowance for Credit Loss	$ 0		$ 0			$ 0
Fund Clients [Member]
Receivables, Net, Current	1,100,000		1,100,000			1,100,000
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	$ 43,000	$ 0	78,000	$ 47,000
U S Global E T Fs [Member] | Fund Clients [Member]
Receivables, Net, Current	$ 944,000		944,000			1,000,000
U S Global Jets U C I T S E T F [Member]
Unitary Management Fee, Percentage of Average Net Assets	0.65%
U S Global Investors Funds [Member]
Aggregate Fees Waived and Expenses Borne	$ 192,000	$ 303,000	$ 445,000	$ 523,000
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%		5.00%
Annual Administrative Fee Rate	0.05%
U S Global Investors Funds [Member] | Fund Clients [Member]
Receivables, Net, Current	$ 115,000		$ 115,000			$ 126,000