WARRANTY LIABILITY (Details) - Summary of Changes in Warrant Liability Included in Accrued Liabilities (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Summary of Changes in Warrant Liability Included in Accrued Liabilities [Abstract]
Balance, beginning of period	$ 6,929	$ 7,743	$ 6,649	$ 8,856
Warranties issued and changes in estimated pre-existing warranties	1,135	662	2,101	656
Actual warranty costs incurred	(953)	(981)	(1,639)	(2,088)
Balance, end of period	$ 7,111	$ 7,424	$ 7,111	$ 7,424