WARRANTY LIABILITY (Details) - Summary of changes in warrant liability included in Accrued liabilities (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Summary of changes in warrant liability included in Accrued liabilities [Abstract]
Balance, beginning of period	$ 7,424	$ 10,356	$ 8,856	$ 7,963
Warranties issued and changes in estimated pre-existing warranties	1,309	579	1,965	5,525
Actual warranty costs incurred	(1,342)	(1,174)	(3,430)	(3,727)
Balance, end of period	$ 7,391	$ 9,761	$ 7,391	$ 9,761