WARRANTY LIABILITY (Details) - Summary of changes in warrant liability included in Accrued liabilities (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Summary of changes in warrant liability included in Accrued liabilities [Abstract]
Balance, beginning of period	$ 8,856	$ 7,963
Warranties issued and changes in estimated pre-existing warranties	2,331	6,088
Actual warranty costs incurred	(4,538)	(5,195)
Balance, end of period	$ 6,649	$ 8,856