Segment Reporting - Additional Information (Detail)	12 Months Ended
	Sep. 30, 2025 Segment
Segment Reporting [Abstract]
Number of operating segments	1
Number of reportable segments	1
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]	Chief Executive Officer [Member]
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description	The CODM reviews net income and Adjusted EBITDA on a monthly basis to monitor performance, compare actual results to budgets and forecasts, and assess overall operating effectiveness.
Segment Reporting, Expense Information Used by CODM, Description	The CODM also monitors significant expenses, including: cost of product, cost of installations and service, general and administrative expenses as well as components of delivery and branch expenses.