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OTHER COMPREHENSIVE INCOME (Schedule of Components of Other Comprehensive Income and Related Income Tax Effects) (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Other comprehensive income (loss)    
Available-for-sale investments before tax $ (14) $ 343
Tax (benefit) expense 4 (97)
Available-for-sale investments after tax (10) 246
Other comprehensive income, net before tax (14) 343
Tax (benefit) expense, Total 4 (97)
Other comprehensive income, net after tax $ (10) $ 246