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INVESTMENT MANAGEMENT AND OTHER FEES (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018 | Jun. 30, 2018
U.S. Global Investors Funds [Member] |  |  |  |  |
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items] |  |  |  |  |
Aggregate Fees Waived and Expenses Borne | $ 164 | $ 148 | $ 541 | $ 482 |
U.S. Global ETFs [Member] |  |  |  |  |
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items] |  |  |  |  |
Unitary Management Fee, Percentage of Average Net Assets |  |  | 0.60% |  |
Fund Clients [Member] |  |  |  |  |
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items] |  |  |  |  |
Receivables, Net, Current | 322 |  | $ 322 |  | $ 419
Fund Clients [Member] | U.S. Global Investors Funds [Member] |  |  |  |  |
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items] |  |  |  |  |
Receivables, Net, Current | 250 |  | 250 |  | 321
Fund Clients [Member] | U.S. Global ETFs [Member] |  |  |  |  |
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items] |  |  |  |  |
Receivables, Net, Current | $ 43 |  | $ 43 |  | 54
Investor Class Shares [Member] | U.S. Global Investors Funds [Member] |  |  |  |  |
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items] |  |  |  |  |
Administrative fee rate |  |  | 0.05% |  |
Institutional Class Shares [Member] | U.S. Global Investors Funds [Member] |  |  |  |  |
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items] |  |  |  |  |
Administrative fee rate |  |  | 0.04% |  |
Equity Funds [Member] | U.S. Global Investors Funds [Member] |  |  |  |  |
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items] |  |  |  |  |
Base percentage adjustment, fund performance not within benchmark index | 0.25% |  | 0.25% |  |
Minimum performance to designated benchmark over prior rolling twelve months, percent | 5.00% |  | 5.00% |  |
Galileo [Member] | Fund Clients [Member] |  |  |  |  |
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items] |  |  |  |  |
Aggregate Fees Waived and Expenses Borne | $ 66 | $ (31) | $ 227 | $ (5) |
Receivables, Net, Current | $ 29 |  | $ 29 |  | $ 44

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