FINANCIAL INFORMATION BY BUSINESS SEGMENT (Details) - Investment Management Services [Member] - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
U.S. Global Investors Funds [Member]
FINANCIAL INFORMATION BY BUSINESS SEGMENT (Details) [Line Items]
Net operating revenues	$ 4.5	$ 2.7
U.S. Global ETFs [Member]
FINANCIAL INFORMATION BY BUSINESS SEGMENT (Details) [Line Items]
Net operating revenues	$ 17.1	$ 1.7