Note 12 - Financial Information by Business Segment (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Revenue from Contract with Customer, Including Assessed Tax	$ 2,818,000	$ 3,728,000	$ 5,951,000	$ 8,140,000
Investment Management Services [Member]
Revenue from Contract with Customer, Including Assessed Tax	2,818,000	3,728,000	5,951,000	8,140,000
Investment Management Services [Member] | U S Global E T Fs [Member]
Revenue from Contract with Customer, Including Assessed Tax	2,500,000	3,300,000	5,200,000	7,200,000
Investment Management Services [Member] | U S Global Investors Funds [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 356,000	$ 423,000	$ 780,000	$ 922,000