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Note 3 - Investment Management and Other Fees - Operating Revenues Disaggregated by Performance Obligation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Revenue from Contract with Customer, Including Assessed Tax	$ 2,103	$ 2,593	$ 6,492	$ 8,544
Investment And Advisory Services [Member]
Revenue from Contract with Customer, Including Assessed Tax	2,072	2,566	6,400	8,458
Investment And Advisory Services [Member] | U S Global E T Fs [Member]
Revenue from Contract with Customer, Including Assessed Tax	1,657	2,224	5,251	7,394
Investment And Advisory Services [Member] | U S Global Investors Funds [Member]
Revenue from Contract with Customer, Including Assessed Tax	484	443	1,378	1,408
Investment Performance [Member] | U S Global Investors Funds [Member]
Revenue from Contract with Customer, Including Assessed Tax	(69)	(101)	(229)	(344)
Administrative Service [Member]
Revenue from Contract with Customer, Including Assessed Tax	31	27	92	86
Administrative Service [Member] | U S Global Investors Funds [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 31	$ 27	$ 92	$ 86

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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