WARRANTY LIABILITY (Details) - Summary of Changes in Warrant Liability Included in Accrued Liabilities - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Balance, beginning of period			$ 4,934	$ 6,649
Warranties issued and changes in estimated pre-existing warranties	$ 1,057	$ 576	3,848	2,677
Actual warranty costs incurred	(1,803)	(1,199)	(3,854)	(2,838)
Balance, end of period	$ 4,928	$ 6,488	$ 4,928	$ 6,488