XML 70 R1.htm IDEA: XBRL DOCUMENT v2.4.0.8
Document and Entity Information (USD $)
12 Months Ended
Jun. 30, 2014
Aug. 18, 2014
Common Class A [Member]
Dec. 31, 2013
Common Class A [Member]
Aug. 18, 2014
Common Class B [Member]
Aug. 18, 2014
Common Class C [Member]
Dec. 31, 2013
Common Class C [Member]
Entity Information [Line Items]            
Entity Registrant Name U S GLOBAL INVESTORS INC          
Trading Symbol GROW          
Entity Central Index Key 0000754811          
Current Fiscal Year End Date --06-30          
Entity Filer Category Non-accelerated Filer          
Document Type 10-K          
Document Period End Date Jun. 30, 2014          
Document Fiscal Year Focus 2014          
Document Fiscal Period Focus FY          
Amendment Flag false          
Entity Common Stock, Shares Outstanding   13,361,378   0 2,069,187  
Entity Well-known Seasoned Issuer No          
Entity Voluntary Filers No          
Entity Current Reporting Status Yes          
Entity Public Float     $ 22,700,602     $ 1,308