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, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share Basic And Diluted Abstract
Income (Loss) from Continuing Operations (in Dollars)	$ (1,557)	$ 892	$ (5,962)	$ (3,678)
Income (Loss) from Discontinued Operations (in Dollars)	(85)	(174)	(338)	149
Less: Net Income (Loss) Attributable to Non-Controlling Interest from Discontinued Operations (in Dollars)	(30)	(61)	(118)	52
Net Income (Loss) Attributable from Discontinued Operations to U.S. Global Investors, Inc. (in Dollars)	(55)	(113)	(220)	97
Net Income (Loss) Attributable to U.S. Global Investors, Inc. (in Dollars)	$ (1,612)	$ 779	$ (6,182)	$ (3,581)
Weighted average number of outstanding shares
Basic (in Shares)	15,121,950	15,132,408	15,127,118	15,141,061
Employee stock options (in Shares)	0	0	0	0
Diluted (in Shares)	15,121,950	15,132,408	15,127,118	15,141,061
Basic Net Income (Loss) per Share
Income (loss) from continuing operations	$ (0.11)	$ 0.06	$ (0.40)	$ (0.24)
Income (loss) from discontinued operations	0	(0.01)	(0.01)	0
Net income (loss)	(0.11)	0.05	(0.41)	(0.24)
Diluted Net Income (Loss) per Share
Income (loss) from continuing operations	(0.11)	0.06	(0.40)	(0.24)
Income (loss) from discontinued operations	0	(0.01)	(0.01)	0
Net income (loss)	$ (0.11)	$ 0.05	$ (0.41)	$ (0.24)