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DISCONTINUED OPERATIONS - Summary of Balance sheets information of installation services and other discontinued activities (Details) - Installation Services and Other Discontinued Activities - Discontinued Operations - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Prepaid and other current assets	$ 1,302	$ 648
Other long-term assets	4,699	3,417
Total assets of discontinued operations	6,001	4,065
Accrued liabilities, current	3,956	4,498
Other long-term liabilities	4,770	3,270
Total liabilities of discontinued operations	$ 8,726	$ 7,768

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