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INVESTMENTS (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2017 USD ($) | Mar. 31, 2016 USD ($) | Mar. 31, 2017 USD ($) | Mar. 31, 2016 USD ($) | Jun. 30, 2016 USD ($)
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |
Fair value of investments held |  | $ 13,244 |  | $ 13,244 |  | $ 13,585
Cost basis of investments held |  | $ 14,000 |  | $ 14,000 |  |
Market value of investments to Company's total assets |  | 50.90% |  | 50.90% |  |
Other investments |  | $ 2,637 |  | $ 2,637 |  | 1,924
Available-for-sale, net unrealized gain (loss), gross |  | 205 |  | 205 |  | 45
Available-for-sale, net unrealized gain (loss), net of tax |  | 205 |  | 205 |  | $ 45
Other-than-temporary impairments |  | 0 | $ 0 | 16 | $ 259 |
Cost-method Investments, Other than Temporary Impairment |  | $ 0 | 0 | $ 0 | $ 258 |
Percentage of Financial Assets Derived From Level 1 Inputs Measured at Fair Value |  | 100.00% |  | 100.00% |  | 100.00%
Trading Securities | [1] | $ 9,720 |  | $ 9,720 |  | $ 10,104
U.S. Global Investors Funds [Member] |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |
Fair value of investments held |  | 10,700 |  | 10,700 |  |
Offshore Fund [Member] |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |
Fair value of investments held |  | 430 |  | 430 |  |
Offshore Fund [Member] | Net Asset Value Per Share [Member] |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |
Trading Securities |  | $ 430 |  | $ 430 |  | $ 358
Minimum redmption notice |  |  |  | 45 days |  |
Impaired Securities [Member] |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |
Number of positions, subject to impairment loss |  |  |  | 2 | 8 |
Available-for-Sale Securities, Combined Cost Basis of Impaired Securities |  |  |  | $ 98 | $ 702 |
Available-for-Sale Securities, Combined Fair Value of Impaired Securities |  |  |  | $ 82 | $ 466 |
Number of Impaired Securities Held at Cost |  |  |  |  | 3 |
Cost Method Investments, Original Cost |  |  | 1,100 |  | $ 1,100 |
Cost Method Investments |  |  | $ 867 |  | 867 |
Impaired Securities, Net Present Value of Estimated Cash Flows [Member] | Corporate Debt Securities [Member] |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |
Available-for-Sale Securities, Combined Cost Basis of Impaired Securities |  |  |  |  | 970 |
Available-for-Sale Securities, Combined Fair Value of Impaired Securities |  |  |  |  | $ 947 |
[1] | Unrealized and realized gains and losses on trading securities are included in earnings in the statement of operations.

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