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INVESTMENTS (Details) - Components of Company's Equity Securities Measured at Fair Value - USD ($)
$ in Thousands
Jun. 30, 2019
Jun. 30, 2018
INVESTMENTS (Details) - Components of Company's Equity Securities Measured at Fair Value [Line Items]    
Securities, Cost $ 14,640  
Securities, Unrealized Gains (Losses) 547  
Securities, Fair Value 15,187  
Trading securities, Cost [1]   $ 8,365
Trading securities, Fair Value [1]   8,179
Trading securities, Unrealized Gains [1]   22
Trading securities, Unrealized (Losses) [1]   (208)
Available-for-sale securities, Cost [2],[3]   3,948
Available-for-sale securities, Fair Value [2],[3]   7,086
Available-for-sale securities, Unrealized Gains [2],[3]   3,241
Available-for-sale securities, Unrealized (Losses) [2],[3]   (103)
Total securities at fair value, Cost   12,313
Total securities at fair value, Fair Value   15,265
Total securities at fair value, Unrealized Gains   3,263
Total securities at fair value, Unrealized (Losses)   (311)
Common Stock - International [Member]    
INVESTMENTS (Details) - Components of Company's Equity Securities Measured at Fair Value [Line Items]    
Securities, Cost 5,641  
Securities, Unrealized Gains (Losses) 790  
Securities, Fair Value 6,431  
Available-for-sale securities, Cost [3]   2,554
Available-for-sale securities, Fair Value [3]   5,673
Available-for-sale securities, Unrealized Gains [3]   3,213
Available-for-sale securities, Unrealized (Losses) [3]   (94)
Common Stock - Domestic [Member]    
INVESTMENTS (Details) - Components of Company's Equity Securities Measured at Fair Value [Line Items]    
Securities, Cost [1] 45  
Securities, Unrealized Gains (Losses) [1] (45)  
Securities, Fair Value [1] 0  
Fixed Income Securities [Member]    
INVESTMENTS (Details) - Components of Company's Equity Securities Measured at Fair Value [Line Items]    
Securities, Cost [1] 8,025  
Securities, Unrealized Gains (Losses) [1] (4)  
Securities, Fair Value [1] 8,021  
Trading securities, Cost [1]   7,785
Trading securities, Fair Value [1]   7,807
Trading securities, Unrealized Gains [1]   22
Trading securities, Unrealized (Losses) [1]   0
Available-for-sale securities, Cost [3]   1,000
Available-for-sale securities, Fair Value [3]   991
Available-for-sale securities, Unrealized Gains [3]   0
Available-for-sale securities, Unrealized (Losses) [3]   (9)
Mutual Funds, Domestic Equity [Member]    
INVESTMENTS (Details) - Components of Company's Equity Securities Measured at Fair Value [Line Items]    
Securities, Cost [1] 929  
Securities, Unrealized Gains (Losses) [1] (194)  
Securities, Fair Value [1] $ 735  
Trading securities, Cost [1]   535
Trading securities, Fair Value [1]   372
Trading securities, Unrealized Gains [1]   0
Trading securities, Unrealized (Losses) [1]   (163)
Available-for-sale securities, Cost [3]   394
Available-for-sale securities, Fair Value [3]   422
Available-for-sale securities, Unrealized Gains [3]   28
Available-for-sale securities, Unrealized (Losses) [3]   0
Other Securities [Member]    
INVESTMENTS (Details) - Components of Company's Equity Securities Measured at Fair Value [Line Items]    
Trading securities, Cost [1]   45
Trading securities, Fair Value [1]   0
Trading securities, Unrealized Gains [1]   0
Trading securities, Unrealized (Losses) [1]   $ (45)
[1] Prior to July 1, 2018, changes in unrealized and realized gains and losses on trading securities were included in earnings in the statement of operations.
[2] Net unrealized gains on available-for-sale securities gross and net of tax as of June 30, 2018, were $3,138 and $2,089, respectively.
[3] Prior to July 1, 2018, changes in unrealized gains and losses on available-for-sale securities were excluded from earnings and recorded in other comprehensive income as a separate component of shareholders' equity until realized.