WARRANTY LIABILITY (Details) - Summary of changes in warrant liability included in Accrued liabilities (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance, beginning of period	$ 6,649	$ 8,856
Warranties issued and changes in estimated pre-existing warranties	2,379	2,331
Actual warranty costs incurred	(4,094)	(4,538)
Balance, end of period	$ 4,934	$ 6,649