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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, 2015
|
Mar. 31, 2014
|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
| Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward] | ||||
| Balance, beginning of period | $ 4,908 | $ 6,929 | $ 4,934 | $ 6,649 |
| Warranties issued and changes in estimated pre-existing warranties | 1,842 | 1,135 | 2,791 | 2,101 |
| Actual warranty costs incurred | (1,076) | (953) | (2,051) | (1,639) |
| Balance, end of period | $ 5,674 | $ 7,111 | $ 5,674 | $ 7,111 |