v3.26.1
WARRANTY LIABILITY - Summary of changes in warrant liability included in accrued liabilities (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Movement in Standard Product Warranty Accrual [Roll Forward]    
Balance, beginning of period $ 5,524 $ 5,268
Warranties issued and changes in estimated pre-existing warranties 12,918 14,537
Actual warranty costs incurred (12,747) (14,281)
Balance, end of period $ 5,695 $ 5,524