EARNINGS PER SHARE (Details) - Schedule of Earnings Per Share, Basic and Diluted - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Schedule of Earnings Per Share, Basic and Diluted [Abstract]
Income (Loss) from Continuing Operations (in Dollars)	$ 8,607	$ (1,557)	$ 27,212	$ (5,962)
Loss from Discontinued Operations (in Dollars)	0	(85)	0	(338)
Less: Net Loss Attributable to Non-Controlling Interest from Discontinued Operations (in Dollars)	0	(30)	0	(118)
Net Loss Attributable from Discontinued Operations to U.S. Global Investors, Inc. (in Dollars)	0	(55)	0	(220)
Net Income (Loss) Attributable to U.S. Global Investors, Inc. (in Dollars)	$ 8,607	$ (1,612)	$ 27,212	$ (6,182)
Weighted average number of outstanding shares
Basic (in Shares)	15,061,818	15,121,950	15,075,064	15,127,118
Employee stock options (in Shares)	1,170	0	731	0
Diluted (in Shares)	15,062,988	15,121,950	15,075,795	15,127,118
Basic Net Income (Loss) per Share
Income (loss) from continuing operations	$ 0.57	$ (0.11)	$ 1.81	$ (0.4)
Loss from discontinued operations	0	0	0	(0.01)
Net income (loss)	0.57	(0.11)	1.81	(0.41)
Diluted Net Income (Loss) per Share
Income (loss) from continuing operations	0.57	(0.11)	1.81	(0.4)
Loss from discontinued operations	0	0	0	(0.01)
Net income (loss)	$ 0.57	$ (0.11)	$ 1.81	$ (0.41)