Note 15 - Financial Information by Business Segment (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Revenue from Contract with Customer, Including Assessed Tax	$ 8,452	$ 10,984
Investment Management Services [Member]
Revenue from Contract with Customer, Including Assessed Tax	8,452	10,984
Investment Management Services [Member] | U S Global E T Fs [Member]
Revenue from Contract with Customer, Including Assessed Tax	6,600	9,400
Investment Management Services [Member] | U S Global Investors Funds [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 1,800	$ 1,600