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BASIS OF PRESENTATION (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Jun. 30, 2016
[1]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Estimated forfeitures when recognizing compensation expense $ 500    
Additional compensation related to the adoption of ASU 2016-09   $ 8,405 $ 678
Accounting Standards Update 2016-09 [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Additional compensation related to the adoption of ASU 2016-09 $ 300    
[1] See Note 1. Basis of Presentation for further discussion on the current presentation.