Note 3 - Investment Management and Other Fees - Operating Revenues Disaggregated by Performance Obligation (Details) - USD ($) $ in Thousands	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	$ 2,818	$ 4,388	$ 5,951
Investment And Advisory Services [Member]
Revenue from Contract with Customer, Including Assessed Tax	2,200	2,790	4,327	5,893
Investment And Advisory Services [Member] | U S Global E T Fs [Member]
Revenue from Contract with Customer, Including Assessed Tax	1,829	2,462	3,593	5,171
Investment And Advisory Services [Member] | U S Global Investors Funds [Member]
Revenue from Contract with Customer, Including Assessed Tax	427	459	893	965
Investment Performance [Member] | U S Global Investors Funds [Member]
Revenue from Contract with Customer, Including Assessed Tax	(56)	(131)	(159)	(243)
Administrative Service [Member]
Revenue from Contract with Customer, Including Assessed Tax	31	28	61	58
Administrative Service [Member] | U S Global Investors Funds [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 31	$ 28	$ 61	$ 58