WARRANTY LIABILITY - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
Mar. 31, 2026	Sep. 30, 2025
Product Warranty Liability [Line Items]
Short-term warranty liability	$ 6,542	$ 5,694
Long-term warranty liability	$ 1,239	$ 1,239
Home and Building Products \| Minimum
Product Warranty Liability [Line Items]
Product warranty period	1 year
Home and Building Products \| Maximum
Product Warranty Liability [Line Items]
Product warranty period	10 years
Discontinued Operations \| Minimum
Product Warranty Liability [Line Items]
Product warranty period	1 year
Discontinued Operations \| Maximum
Product Warranty Liability [Line Items]
Product warranty period	10 years

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-8

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (c)(5)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-8

Name:	us-gaap_ProductWarrantyAccrualClassifiedCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant