Note 15 - Financial Information by Business Segment (Details Textual) $ in Thousands	12 Months Ended
	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)
Revenue from Contract with Customer, Including Assessed Tax	$ 10,251	$ 8,452
Number of Reportable Segments	2
Investment Management Services [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 10,251	8,452
Investment Management Services [Member] | U S Global E T Fs [Member]
Revenue from Contract with Customer, Including Assessed Tax	6,200	6,600
Investment Management Services [Member] | U S Global Investors Funds [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 4,100	$ 1,800