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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