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RELATED PARTY TRANSACTIONS (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
RELATED PARTY TRANSACTIONS (Details) [Line Items]      
Accounts and Other Receivables, Net, Current $ 520 $ 787  
Trading Securities [1],[2] 9,720 10,104  
Other Long-term Investments 2,130 1,924  
Investment Income, Interest and Dividend 820 542 $ 651
Mutual Fund [Member]      
RELATED PARTY TRANSACTIONS (Details) [Line Items]      
Accounts and Other Receivables, Net, Current 396 595  
USGIF and offshore clients [Member]      
RELATED PARTY TRANSACTIONS (Details) [Line Items]      
Fair Value Investment Included in Trading Securitites and Available for Sale Securities 11,100 11,500  
Investment Income, Dividends and Capital Gains 110 180 244
Recognized Gains (Losses) on Related Party Securities, Net 15 (273) (596)
Private Company [Member]      
RELATED PARTY TRANSACTIONS (Details) [Line Items]      
Recognized Gains (Losses) on Related Party Securities, Net   211  
Other Long-term Investments 1,500 723  
Investment Income, Interest and Dividend 105 117 $ 68
Offshore Fund [Member]      
RELATED PARTY TRANSACTIONS (Details) [Line Items]      
Trading Securities [2] $ 415 $ 358  
[1] In accordance with Subtopic 820-10, certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the Consolidated Balance Sheets.
[2] Unrealized and realized gains and losses on trading securities are included in earnings in the statement of operations.