CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS ) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net Income (Loss) Attributable to U.S. Global Investors, Inc.		$ 14,224	$ (1,612)	$ 32,829	$ (6,182)
Other Comprehensive Income (Loss), Net of Tax:
Unrealized gains on available-for-sale securities arising during period	[1]	1,681	0	1,681	0
Foreign currency translation adjustment		6	310	18	311
Comprehensive Income (Loss)		15,911	(1,302)	34,528	(5,871)
Less: Comprehensive Income Attributable to Non-Controlling Interest		0	114	0	114
Comprehensive Income (Loss) Attributable to U.S. Global Investors, Inc.		$ 15,911	$ (1,416)	$ 34,528	$ (5,985)

[1] Amounts include tax expense of $447 for both year-to-date and quarter-ending March 31, 2021.