Annual report [Section 13 and 15(d), not S-K Item 405]

Summary of Significant Accounting Policies - Additional Information (Details)

v3.25.3
Summary of Significant Accounting Policies - Additional Information (Details)
 12 Months Ended
Sep. 30, 2025
USD ($)
segment
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Summary Of Significant Accounting Policies [Line Items]      
Percentage of interest on factoring (in percent) 0.0125%    
Minimum annual commission due in factoring, per contract year $ 200,000    
Factored trade receivables 6,200,000 $ 6,000,000  
Allowance for doubtful accounts 562,000 1,481,000 $ 1,568,000
Inventory reserves 5,499,000 6,424,000  
Revenues 444,944,000 472,840,000  
Advertising Expense $ 1,700,000 1,300,000  
Number of operating segments | segment 5    
Federal Deposit Insurance Corporation insured amount $ 250,000    
Excess of FDIC insurance limit amount 6,300,000    
Cost of revenue | Retail Sales      
Summary Of Significant Accounting Policies [Line Items]      
Revenues 63,300,000 63,100,000  
Cost of revenue | Installation Services      
Summary Of Significant Accounting Policies [Line Items]      
Revenues $ 58,500,000 $ 73,900,000  
Customer Lists      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of intangible assets 20 years    
Trade names      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of intangible assets 20 years    
Minimum      
Summary Of Significant Accounting Policies [Line Items]      
Percentage of factoring commission (in percent) 0.45%    
Minimum | Domain Name and Marketing      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of intangible assets 3 years    
Minimum | Software      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of intangible assets 3 years    
Minimum | Customer relationships      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of intangible assets 7 years    
Minimum | Building and improvements      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of property and equipment 3 years    
Minimum | Transportation equipment      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of property and equipment 5 years    
Minimum | Machinery and equipment      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of property and equipment 3 years    
Minimum | Furnishings and fixtures      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of property and equipment 3 years    
Minimum | Office and Computer Equipment      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of property and equipment 3 years    
Maximum      
Summary Of Significant Accounting Policies [Line Items]      
Percentage of factoring commission (in percent) 0.50%    
Maximum | Domain Name and Marketing      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of intangible assets 20 years    
Maximum | Software      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of intangible assets 5 years    
Maximum | Customer relationships      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of intangible assets 10 years    
Maximum | Building and improvements      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of property and equipment 40 years    
Maximum | Transportation equipment      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of property and equipment 10 years    
Maximum | Machinery and equipment      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of property and equipment 10 years    
Maximum | Furnishings and fixtures      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of property and equipment 5 years    
Maximum | Office and Computer Equipment      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of property and equipment 5 years