Business Combination - Pro Forma Information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Business Combinations [Abstract]
Operating revenues	$ 13,771	$ 20,234	$ 25,229
Net income (loss)	(856)	(13)	1,475
Net income (loss) attributable to U.S. Global Investors, Inc.	$ (916)	$ (99)	$ 1,484
Income (loss) from continuing operations - basic (in dollars per share)	$ (0.04)	$ 0.00	$ 0.11
Income (loss) from continuing operations - diluted (in dollars per share)	$ (0.04)	$ 0.00	$ 0.11

Business Acquisition, Pro Forma Net Income (Loss) Attributable to Parent

No definition available.

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- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

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