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WARRANTY LIABILITY (Details) - Summary of Changes in Warrant Liability Included in Accrued Liabilities - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]    
Balance, beginning of period $ 4,756 $ 4,935
Warranties issued and changes in estimated pre-existing warranties 917 948
Actual warranty costs incurred (895) (975)
Balance, end of period $ 4,778 $ 4,908