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EARNINGS PER SHARE (Details) - Schedule of Earnings Per Share, Basic and Diluted - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share Basic And Diluted Abstract
Net Income (Loss)	$ (1,232)	$ 1,236
Less: Net Loss Attributable to Non-Controlling Interest	(83)	(34)
Net Income (Loss) Attributable to U.S. Global Investors, Inc.	$ (1,149)	$ 1,270
Weighted average number of outstanding shares
Basic	15,144,884	15,182,651
Effect of dilutive securities
Employee stock options	0	0
Diluted	15,144,884	15,182,651
Earnings Per Share Attributable to U.S. Global Investors, Inc.
Basic	$ (0.08)	$ 0.08
Diluted	$ (0.08)	$ 0.08

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