INVESTMENTS (Details) $ in Thousands			3 Months Ended		9 Months Ended
		Jan. 31, 2018 USD ($)	Mar. 31, 2018 USD ($) shares	Mar. 31, 2017 USD ($)	Mar. 31, 2018 USD ($) shares	Mar. 31, 2017 USD ($)	Feb. 28, 2018	Jun. 30, 2017 USD ($)
INVESTMENTS (Details) [Line Items]
Fair value of investments held			$ 20,098		$ 20,098			$ 13,121
Cost basis of investments held			$ 12,399		$ 12,399			13,588
Market value of investments to Company's total assets			59.20%		59.20%
Other investments			$ 2,217		$ 2,217			2,130
Equity Method Investments			1,160		1,160			0
Available-for-sale, net unrealized gain (loss), gross			7,917		7,917			461
Available-for-sale, net unrealized gain (loss), net of tax			6,430		6,430			461
Available-for-sale securities, fair value	[1],[2]		12,951		12,951			3,401
Proceeds from Sale of Available-for-sale Securities			0	$ 0	401	$ 649
Available-for-sale Securities, Gross Realized Gains					37	34
Available-for-sale Securities, Gross Realized Losses					6	3
Other-than-temporary impairments			$ 0	0	$ 0	16
Number of Unit Trust Investment Funds			2		2
Trading Securities	[2]		$ 7,147		$ 7,147			9,720
Income (Loss) from Equity Method Investments			(927)	$ 0	1,804	0
Proceeds from Sale of Equity Method Investments					1,462	$ 0
Fair Value, Inputs, Level 1 [Member]
INVESTMENTS (Details) [Line Items]
Fair value of investments held			20,098		20,098			12,706
Available-for-sale securities, fair value			$ 12,951		$ 12,951			$ 3,401
Percentage of Financial Assets Derived From Level 1 Inputs Measured at Fair Value			100.00%		100.00%			100.00%
Trading Securities			$ 7,147		$ 7,147			$ 9,305
Fair Value, Inputs, Level 2 [Member]
INVESTMENTS (Details) [Line Items]
Fair value of investments held			0		0			0
Available-for-sale securities, fair value			0		0			0
Trading Securities			0		0			0
U.S. Global Investors Funds [Member]
INVESTMENTS (Details) [Line Items]
Investments, Fair Value Disclosure			$ 8,500		$ 8,500
HIVE Blockchain Technologies Ltd. ("HIVE") [Member]
INVESTMENTS (Details) [Line Items]
Investment Owned, Direct, Percentage			3.30%		3.30%
Investment Owned, Percentage			3.70%		3.70%
HIVE Blockchain Technologies Ltd. ("HIVE") [Member] | Fair Value, Inputs, Level 2 [Member]
INVESTMENTS (Details) [Line Items]
Available-for-sale securities, fair value			$ 9,800		$ 9,800
Offshore Fund [Member] | Net Asset Value Per Share [Member]
INVESTMENTS (Details) [Line Items]
Trading Securities								415
Galileo Partners Fund [Member]
INVESTMENTS (Details) [Line Items]
Equity Method Investments			936		936
Equity Method Investment, Aggregate Cost			$ 500		$ 500
Equity Method Investment, Ownership Percentage		30.00%	26.00%		26.00%
Income (Loss) from Equity Method Investments			$ (840)		$ 1,900
Proceeds from Sale of Equity Method Investments		$ 1,500
Galileo Partners Fund [Member] | Minimum [Member]
INVESTMENTS (Details) [Line Items]
Equity Method Investment, Ownership Percentage							23.00%
Galileo Partners Fund [Member] | Maximum [Member]
INVESTMENTS (Details) [Line Items]
Equity Method Investment, Ownership Percentage			26.00%		26.00%
Galileo Technology and Blockchain Fund [Member]
INVESTMENTS (Details) [Line Items]
Equity Method Investments			$ 224		$ 224
Equity Method Investment, Aggregate Cost			$ 325		$ 325
Equity Method Investment, Ownership Percentage			20.00%		20.00%
Income (Loss) from Equity Method Investments			$ (87)		$ (87)
Impaired Securities [Member]
INVESTMENTS (Details) [Line Items]
Number of positions, subject to impairment loss						2
Available-for-Sale Securities, Combined Cost Basis of Impaired Securities						$ 98
Available-for-Sale Securities, Combined Fair Value of Impaired Securities						$ 82
HIVE Blockchain Technologies Ltd. ("HIVE") [Member]
INVESTMENTS (Details) [Line Items]
Investment Owned, Balance, Shares (in Shares) | shares			10,000,000		10,000,000
Investment Owned, at Cost			$ 2,400		$ 2,400
HIVE Blockchain Technologies Ltd. ("HIVE") [Member] | Galileo Partners Fund [Member]
INVESTMENTS (Details) [Line Items]
Investment Owned, Balance, Shares (in Shares) | shares			5,000,000		5,000,000
HIVE Blockchain Technologies Ltd. ("HIVE") [Member] | Galileo Technology and Blockchain Fund [Member]
INVESTMENTS (Details) [Line Items]
Investment Owned, Balance, Shares (in Shares) | shares			95,000		95,000
Corporate Debt Securities [Member]
INVESTMENTS (Details) [Line Items]
Available-for-sale securities, fair value	[2],[3]		$ 1,711		$ 1,711			1,469
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
INVESTMENTS (Details) [Line Items]
Available-for-sale securities, fair value			1,711		1,711			1,469
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
INVESTMENTS (Details) [Line Items]
Available-for-sale securities, fair value			$ 0		$ 0			$ 0

[1] Net unrealized gains (losses) on available-for-sale securities gross and net of tax as of March 31, 2018, are $7,917 and $6,430, respectively, and as of June 30, 2017, are $461 and $461, respectively.

[2] Unrealized and realized gains and losses on trading securities are included in earnings in the statement of operations.

[3] Corporate debt has stated maturity in 2024, but issuer has issued notice that it intends to redeem early, as discussed below and in Note 12, Subsequent Events.