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INVESTMENTS (Details) - USD ($) $ in Thousands, shares in Millions | 3 Months Ended | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019 | Jun. 30, 2019 | Dec. 31, 2018 | Nov. 30, 2018 | Jun. 30, 2018
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |  |  |  |
Equity Securities, FV-NI | $ 9,480 |  | $ 9,480 |  |  | $ 15,187 |  |  |
Equity Securities, FV-NI, Cost | $ 12,928 |  | $ 12,928 |  |  | 14,640 |  |  |
Market value of investments to Company's total assets | 56.70% |  | 56.70% |  |  |  |  |  |
Other investments | $ 1,518 |  | $ 1,518 |  |  | 1,404 |  |  |
Equity Method Investments | 150 |  | 150 |  |  | 309 |  |  |
Foreign Currency Transaction Gain (Loss), before Tax | (228) |  | (228) | $ (22) |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Amount | 1,518 | $ 645 | 1,518 | 645 | $ 1,488 | 1,404 | $ 602 |  | $ 2,207
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Cumulative Amount | 251 |  | 251 |  |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Cumulative Amount | 777 |  | 777 |  |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount | 108 | 29 | 124 | 49 |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Cumulative Amount | 781 |  | 781 |  |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount | 63 | 0 | 163 | 0 |  |  |  |  |
Income (Loss) from Equity Method Investments | (91) | 3 | (146) | (52) |  |  |  |  |
Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |  |  |  |
Equity Securities, FV-NI | $ 9,259 |  | $ 9,259 |  |  | $ 14,355 |  |  |
Percentage of Financial Assets Derived From Level 1 Inputs Measured at Fair Value | 98.00% |  | 98.00% |  |  | 95.00% |  |  |
Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |  |  |  |
Equity Securities, FV-NI | $ 221 |  | $ 221 |  |  | $ 832 |  |  |
Percentage of Financial Assets Derived From Level 2 Inputs Measured at Fair Value | 2.00% |  | 2.00% |  |  | 5.00% |  |  |
Galileo Technology and Blockchain Fund LP [Member] |  |  |  |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |  |  |  |
Equity Method Investments | $ 150 |  | $ 150 |  |  |  |  |  |
Equity Method Investment, Aggregate Cost |  |  |  |  |  |  |  | $ 230 |
Equity Method Investment, Ownership Percentage | 22.00% |  | 22.00% |  |  |  |  |  |
Income (Loss) from Equity Method Investments | $ (91) | $ 3 | $ (146) | (2) |  |  |  |  |
U.S. Global Investors Funds [Member] |  |  |  |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |  |  |  |
Equity Securities, FV-NI | 6,900 |  | 6,900 |  |  | $ 8,800 |  |  |
Equity Securities [Member] |  |  |  |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |  |  |  |
Debt and Equity Securities, Unrealized Gain (Loss) | (442) |  | (4,000) |  |  |  |  |  |
HIVE Blockchain Technologies Ltd. ("HIVE") [Member] |  |  |  |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |  |  |  |
Equity Securities, FV-NI | $ 1,300 |  | $ 1,300 |  |  | $ 3,600 |  |  |
Investment Owned, Balance, Shares (in Shares) | 10 |  | 10 |  |  | 10 |  |  |
Investment Owned, at Cost | $ 2,400 |  | $ 2,400 |  |  |  |  |  |
Investment Owned, Direct Percentage | 3.10% |  | 3.10% |  |  |  |  |  |
Galileo Technology and Blockchain Fund [Member] |  |  |  |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |  |  |  |
Equity Method Investment, Aggregate Cost |  |  |  |  |  |  |  |  | $ 401
Income (Loss) from Equity Method Investments |  |  |  | $ (50) |  |  |  |  |
Galileo Technology and Blockchain Fund [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  | 20.00% |  |  |
Galileo Technology and Blockchain Fund [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  | 25.00% |  |  |
Thunderbird Entertainment Group [Member] | Equity Securities [Member] |  |  |  |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |  |  |  |
Equity Securities, FV-NI | $ 562 |  | $ 562 |  |  | $ 1,100 |  |  |
Investment Owned, Direct Percentage | 2.50% |  | 2.50% |  |  |  |  |  |
Thunderbird Entertainment Group [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |  |  |  |
Equity Securities, FV-NI | $ 361 |  | $ 361 |  |  | 377 |  |  |
Thunderbird Entertainment Group [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |  |  |  |
Equity Securities, FV-NI | 201 |  | 201 |  |  | 675 |  |  |
GoldSpot Discoveries, Inc. [Member] | Equity Securities [Member] |  |  |  |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |  |  |  |
Equity Securities, FV-NI | $ 695 |  | $ 695 |  |  | 1,700 |  |  |
Investment Owned, Direct Percentage | 7.50% |  | 7.50% |  |  |  |  |  |
GoldSpot Discoveries, Inc. [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |  |  |  |
Equity Securities, FV-NI | $ 675 |  | $ 675 |  |  | 1,600 |  |  |
GoldSpot Discoveries, Inc. [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |  |
INVESTMENTS (Details) [Line Items] |  |  |  |  |  |  |  |  |
Equity Securities, FV-NI | $ 20 |  | $ 20 |  |  | $ 157 |  |  |

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