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, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share Basic And Diluted Abstract
Net Income (Loss)	$ (1,065)	$ (33)	$ 1,055	$ 256
Less: Net Income (Loss) Attributable to Non-Controlling Interest	(5)	0	96	18
Net Income (Loss) Attributable to U.S. Global Investors, Inc.	$ (1,060)	$ (33)	$ 959	$ 238
Weighted average number of outstanding shares
Basic	15,144,068	15,200,280	15,162,570	15,220,134
Employee stock options	0	0	27	0
Diluted	15,144,068	15,200,280	15,162,597	15,220,134
Earnings Per Share Attributable to U.S. Global Investors, Inc.
Basic	$ (0.07)	$ 0	$ 0.06	$ 0.02
Diluted	$ (0.07)	$ 0	$ 0.06	$ 0.02