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INVESTMENT MANAGEMENT AND OTHER FEES (Details) - USD ($)
$ in Thousands
 3 Months Ended
Sep. 30, 2017
Sep. 30, 2016
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items]    
Advisory fees $ 1,433 $ 1,891
Fund Clients [Member]    
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items]    
Receivables 437  
Galileo [Member]    
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items]    
Advisory fees 218 299
Aggregate Fees Waived and Expenses Borne 24 12
U.S. Global Investors Funds [Member]    
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items]    
Advisory fees $ 1,100 1,500
Base percentage adjustment, fund performance not within benchmark index 0.25%  
Minimum performance to designated benchmark over prior rolling twelve months, percent 5.00%  
Increase (decrease) in base advisory fees realized $ (116) 39
Aggregate Fees Waived and Expenses Borne $ 232 234
U.S. Global Investors Funds [Member] | Investor Class Shares [Member]    
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items]    
Administrative fee rate 0.05%  
U.S. Global Investors Funds [Member] | Institutional Class Shares [Member]    
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items]    
Administrative fee rate 0.04%  
U.S. Global Investors Funds [Member] | Fund Clients [Member]    
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items]    
Receivables $ 318  
U.S. Global ETFs [Member]    
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items]    
Advisory fees $ 185 66
Unitary Management Fee, Percentage of Average Net Assets 0.60%  
Offshore Clients [Member]    
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items]    
Advisory fees $ 1 36
Performance Fees $ 0 $ 0