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RESTRICTED CASH (Details) - Restrictions on Cash and Cash Equivalents - USD ($)
$ in Thousands
Dec. 31, 2018
Jun. 30, 2018
Dec. 31, 2017
Jun. 30, 2017
Restrictions on Cash and Cash Equivalents [Abstract]        
Cash and cash equivalents $ 6,055 $ 6,364    
Restricted cash 1,000 1,000    
Total cash, cash equivalents, and restricted cash $ 7,055 $ 7,364 $ 3,977 $ 4,958