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INVESTMENTS (Details)
$ / shares in Units, $ in Thousands, shares in Millions
3 Months Ended 9 Months Ended 40 Months Ended
Jan. 12, 2021
USD ($)
Mar. 31, 2022
USD ($)
$ / shares
Mar. 31, 2021
USD ($)
Mar. 31, 2022
USD ($)
$ / shares
Mar. 31, 2021
USD ($)
Mar. 31, 2022
USD ($)
$ / shares
Mar. 31, 2022
$ / shares
Jun. 30, 2021
USD ($)
shares
INVESTMENTS (Details) [Line Items]                
Securities, Fair Value   $ 25,184   $ 25,184   $ 25,184   $ 35,307
Investments, Current and Noncurrent, Cost   $ 22,400   $ 22,400   $ 22,400    
Market value of investments to Company's total assets   40.30%   40.30%   40.30%    
Other investments   $ 4,208   $ 4,208   $ 4,208   3,453
Debt Securities, Held-to-Maturity, Fair Value, Noncurrent   1,000   1,000   1,000    
Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value   12,706   12,706   12,706    
Realized Gain (Loss) on Principal Payment Proceeds   524 $ 552 1,694 $ 552      
Equity Securities without Readily Determinable Fair Value, Amount   4,208 2,940 4,208 2,940 4,208   3,500
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Cumulative Amount   2,500   2,500   2,500    
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Cumulative Amount   1,500   1,500   1,500    
Other Investments [1]   362   362   362   2,554
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount   187 1,156 187 1,156      
Income (Loss) from Equity Method Investments   (173) (64) (206) 420      
Equity Method Investments   0   0   0   532
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax   10 0 10 0      
Equity Securities Without Readily Determinable Fair Values Unrealized Gain (Loss)   187 1,100 (187) 1,000      
Fair Value, Inputs, Level 3 [Member]                
INVESTMENTS (Details) [Line Items]                
Securities, Fair Value   17,464   17,464   17,464   25,075
Other Investments [1]   362   362   362   2,554
Fair Value, Inputs, Level 1 [Member]                
INVESTMENTS (Details) [Line Items]                
Securities, Fair Value   7,720   7,720   7,720   10,097
Other Investments [1]   0   0   0   0
HIVE Blockchain Technologies Ltd. ("HIVE") [Member] | Fair Value, Inputs, Level 3 [Member] | Warrants and Convertible Debt [Member]                
INVESTMENTS (Details) [Line Items]                
Securities, Fair Value   17,500   17,500   $ 17,500   25,100
Galileo New Economy Fund LP [Member]                
INVESTMENTS (Details) [Line Items]                
Income (Loss) from Equity Method Investments   (173) (64) (206) $ 420      
Equity Method Investments               532
Galileo New Economy Fund LP [Member] | Maximum [Member]                
INVESTMENTS (Details) [Line Items]                
Equity Method Investment, Ownership Percentage           22.00%    
Galileo New Economy Fund LP [Member] | Cash [Member]                
INVESTMENTS (Details) [Line Items]                
Proceeds from Equity Method Investment, Distribution, Return of Capital   85            
Galileo New Economy Fund LP [Member] | Common Shares [Member]                
INVESTMENTS (Details) [Line Items]                
Proceeds from Equity Method Investment, Distribution, Return of Capital   228            
Securities Investment [Member] | HIVE Blockchain Technologies Ltd. ("HIVE") [Member]                
INVESTMENTS (Details) [Line Items]                
Investment Owned, at Cost $ 15,000              
Debt Securities [Member]                
INVESTMENTS (Details) [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value   $ 12,706   $ 12,706   $ 12,706   $ 17,049
Debt Securities [Member] | HIVE Blockchain Technologies Ltd. ("HIVE") [Member]                
INVESTMENTS (Details) [Line Items]                
Debt Instrument, Interest Rate, Stated Percentage               8.00%
Debt Instrument, Convertible, Conversion Price (in Dollars per share) | $ / shares   $ 2.34   $ 2.34   $ 2.34    
Investment Owned, Balance, Principal Amount   $ 11,300   $ 11,300   $ 11,300   $ 14,300
Debt Securities, Available-for-Sale, Unrealized Gain 6,900              
Realized Gain (Loss) on Principal Payment Proceeds   524 $ 552 1,700        
Debt Securities, Available-for-Sale, Unrealized Gain (Loss)       4,000        
Debt Securities [Member] | HIVE Blockchain Technologies Ltd. ("HIVE") [Member] | Fair Value, Inputs, Level 3 [Member] | Debentures [Member]                
INVESTMENTS (Details) [Line Items]                
Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value 16,000              
Equity Securities [Member]                
INVESTMENTS (Details) [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value   4,758   $ 4,758   4,758   $ 8,026
Equity Securities [Member] | HIVE Blockchain Technologies Ltd. ("HIVE") [Member]                
INVESTMENTS (Details) [Line Items]                
Investment, Common Share Purchase Warrants (in Shares) | shares               5
Warrant, Description       Each whole warrant, expiring in January 2024, entitles the Company to acquire one common share at a price of $3.00 (Canadian).        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share) | $ / shares             $ 3  
Equity Securities [Member] | HIVE Blockchain Technologies Ltd. ("HIVE") [Member] | Fair Value, Inputs, Level 3 [Member] | Warrant [Member]                
INVESTMENTS (Details) [Line Items]                
Equity Securities, FV-NI, Cost $ 5,900              
Equity Securities [Member] | Thunderbird Entertainment Group [Member] | Fair Value, Inputs, Level 1 [Member]                
INVESTMENTS (Details) [Line Items]                
Equity Securities, FV-NI, Current               $ 2,700
Equity Securities, FV-NI, Realized Gain       $ 1,900        
U.S. Global Investors Funds [Member]                
INVESTMENTS (Details) [Line Items]                
Equity Securities, FV-NI, Current   7,000   7,000   7,000   7,300
Other Investments [Member] | The Sonar Company (“Sonar”) [Member]                
INVESTMENTS (Details) [Line Items]                
Equity Securities without Readily Determinable Fair Value, Amount   362   362   362    
Other Investments and Securities, at Cost   175   $ 175   $ 175    
Other Investments               $ 100
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount   $ 187            
Equity Method Investment, Ownership Percentage   3.70%            
[1] Other investments include equity securities without readily determinable fair values that were adjusted as a result of the measurement alternative on dates during the fiscal year ended June 30, 2021. These securities are classified as level 3 due to the infrequency of the observable price changes and/or restrictions on the shares.