EARNINGS PER SHARE - Computation for Basic and Diluted Earnings Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Loss from continuing operations	$ (841)	$ (958)	$ (931)	$ (967)
Less: Income attributable to non-controlling interest in subsidiary	1	0	39	0
Loss from Continuing Operations	(842)	(958)	(970)	(967)
Loss from discontinued operations attributable to U.S. Global Investors, Inc.	0	(207)	0	(236)
Net Loss Attributable to U.S. Global Investors, Inc.	$ (842)us-gaap_NetIncomeLoss	$ (1,165)us-gaap_NetIncomeLoss	$ (970)us-gaap_NetIncomeLoss	$ (1,203)us-gaap_NetIncomeLoss
Weighted average number of outstanding shares, Basic (in shares)	15,409,292	15,472,370	15,419,309	15,471,816
Effect of dilutive securities
Employee stock options (in shares)	0	0	0	0
Diluted (in shares)	15,409,292	15,472,370	15,419,309	15,471,816
Basic:
Loss from continuing operations (in dollars per share)	$ (0.05)	$ (0.06)	$ (0.06)	$ (0.06)
Loss from discontinued operations (in dollars per share)	$ 0.00	$ (0.02)	$ 0.00	$ (0.02)
Net loss (in dollars per share)	$ (0.05)us-gaap_EarningsPerShareBasic	$ (0.08)us-gaap_EarningsPerShareBasic	$ (0.06)us-gaap_EarningsPerShareBasic	$ (0.08)us-gaap_EarningsPerShareBasic
Diluted:
Loss from continuing operations (in dollars per share)	$ (0.05)	$ (0.06)	$ (0.06)	$ (0.06)
Loss from discontinued operations (in dollars per share)	$ 0.00	$ (0.02)	$ 0.00	$ (0.02)
Net loss (in dollars per share)	$ (0.05)us-gaap_EarningsPerShareDiluted	$ (0.08)us-gaap_EarningsPerShareDiluted	$ (0.06)us-gaap_EarningsPerShareDiluted	$ (0.08)us-gaap_EarningsPerShareDiluted

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items, and noncontrolling interest.

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The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.

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Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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Per basic share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation.

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Per diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation.

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Amount of Net Income (Loss) attributable to noncontrolling interest.

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