Note 12 - Financial Information by Business Segment (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Revenue from Contract with Customer, Including Assessed Tax	$ 2,231,000	$ 2,818,000	$ 4,388,000	$ 5,951,000
Investment Management Services [Member]
Revenue from Contract with Customer, Including Assessed Tax	2,231,000	2,818,000	4,388,000	5,951,000
Investment Management Services [Member] | U S Global E T Fs [Member]
Revenue from Contract with Customer, Including Assessed Tax	1,800,000	2,500,000	3,600,000	5,200,000
Investment Management Services [Member] | U S Global Investors Funds [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 402,000	$ 356,000	$ 795,000	$ 780,000