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EARNINGS PER SHARE (Details) - Schedule of Earnings Per Share, Basic and Diluted - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share Basic And Diluted Abstract
Net Income (Loss)	$ 689	$ (544)
Less: Net Income (Loss) Attributable to Non-Controlling Interest	42	(31)
Net Income (Loss) Attributable to U.S. Global Investors, Inc.	$ 647	$ (513)
Weighted average number of outstanding shares
Basic	15,158,067	15,212,008
Effect of dilutive securities
Employee stock options	0	0
Diluted	15,158,067	15,212,008
Earnings Per Share Attributable to U.S. Global Investors, Inc.
Basic	$ 0.04	$ (0.03)
Diluted	$ 0.04	$ (0.03)

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