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Note 12 - Financial Information by Business Segment (Details Textual) - USD ($)	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	$ 2,103,000	$ 2,593,000	$ 6,492,000	$ 8,544,000
Investment Management Services [Member]
Revenue from Contract with Customer, Including Assessed Tax	2,103,000	2,593,000	6,492,000	8,544,000
Investment Management Services [Member] | U S Global E T Fs [Member]
Revenue from Contract with Customer, Including Assessed Tax	1,700,000	2,200,000	5,300,000	7,400,000
Investment Management Services [Member] | U S Global Investors Funds [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 446,000	$ 369,000	$ 1,200,000	$ 1,200,000

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- Definition

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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