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Related Party Transactions (Details) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Sep. 30, 2024
Related Party Transaction [Line Items]          
Long-term debt $ 244,129,000   $ 244,129,000    
Accounts payable 5,652,000   5,652,000   $ 5,637,000
Nottingham Creations and Sherwood Forest Creations LLC          
Related Party Transaction [Line Items]          
Related party transaction, amounts of transaction 3,974 $ 202,700 6,754 $ 344,798  
TW Mechanical LLC          
Related Party Transaction [Line Items]          
Related party transaction, amounts of transaction 681 228 1,401 3,160  
Related Party | Ed Anakar and Nourdean Anakar          
Related Party Transaction [Line Items]          
Notes borrowed 500,000   500,000   500,000
Related Party | Allen Chhay and Bradley Chhay          
Related Party Transaction [Line Items]          
Notes borrowed 150,000   150,000   150,000
Related Party | Nottingham Creations and Sherwood Forest Creations LLC          
Related Party Transaction [Line Items]          
Accounts payable 3,312   3,312   18,700
Related Party | TW Mechanical LLC          
Related Party Transaction [Line Items]          
Accounts payable $ 227   $ 227   0
Related party, ownership percentage 50.00%   50.00%    
Related Party | TW Mechanical LLC | Third-Party General Contractor          
Related Party Transaction [Line Items]          
Related party transaction, amounts of transaction $ 0 $ 0 $ 0 $ 0  
Commercial Bank Indebtedness          
Related Party Transaction [Line Items]          
Long-term debt $ 137,300,000   $ 137,300,000   $ 135,300,000