Note 16 - Financial Information by Business Segment (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Revenue from Contract with Customer, Including Assessed Tax	$ 10,984	$ 15,074
Investment Management Services [Member]
Revenue from Contract with Customer, Including Assessed Tax	10,984	15,074
Investment Management Services [Member] | U S Global E T Fs [Member]
Revenue from Contract with Customer, Including Assessed Tax	9,400	13,200
Investment Management Services [Member] | U S Global Investors Funds [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 1,600	$ 1,900