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Summary of Significant Accounting Policies - Narrative (Details)
 3 Months Ended 12 Months Ended
Sep. 30, 2024
USD ($)
Sep. 30, 2024
USD ($)
customer
shares
Sep. 30, 2023
USD ($)
customer
shares
Oct. 31, 2024
Accounting Policies [Line Items]        
Allowance for credit losses $ 117,000 $ 117,000 $ 237,000  
Accounts receivable, allowance for credit loss, writeoffs   30,000 16,000  
Bad debt expense (benefit)   $ 90,000 $ (194,000)  
Percentage of inventory estimated using LIFO method 30.00% 30.00% 36.00%  
Net realizable value reserves   $ 705,000 $ 669,000  
Obsolete and excess inventory valuation reserves, net of writedown   2,028,000 1,495,000  
Depreciation expense   $ 4,784,000 $ 4,998,000  
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares) | shares   238,000 202,000  
Valuation allowance $ 700,000 $ (2,000,000) $ (2,534,000)  
Government Assistance, Income, Increase (Decrease), Statement of Income or Comprehensive Income [Extensible Enumeration]   Selling, general and administrative expenses    
Discontinued Operations, Disposed of by Sale | C Blade | Subsequent event        
Accounting Policies [Line Items]        
Share purchase agreement, percentage to be acquired       100.00%
Employee Retention Credit Program        
Accounting Policies [Line Items]        
Interest income   $ 0 84,000  
Interest expense   $ 0    
Gross benefit     1,772,000  
Proceeds from employee retention credit refund     1,688,000  
Cost of goods sold     1,452,000  
Selling, general and administrative expense     236,000  
Professional fees     $ 354,000  
Restricted shares        
Accounting Policies [Line Items]        
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares) | shares   0    
Performance shares        
Accounting Policies [Line Items]        
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares) | shares   0    
Minimum        
Accounting Policies [Line Items]        
Finite-lived intangible asset, useful life (in years) 1 year 1 year    
Maximum        
Accounting Policies [Line Items]        
Finite-lived intangible asset, useful life (in years) 10 years 10 years    
Building and Building Improvements | Minimum        
Accounting Policies [Line Items]        
Property, plant and equipment, useful life (in years) 5 years 5 years    
Building and Building Improvements | Maximum        
Accounting Policies [Line Items]        
Property, plant and equipment, useful life (in years) 40 years 40 years    
Machinery and Equipment | Minimum        
Accounting Policies [Line Items]        
Property, plant and equipment, useful life (in years) 3 years 3 years    
Machinery and Equipment | Maximum        
Accounting Policies [Line Items]        
Property, plant and equipment, useful life (in years) 20 years 20 years    
Computer Software | Minimum        
Accounting Policies [Line Items]        
Property, plant and equipment, useful life (in years) 3 years 3 years    
Computer Software | Maximum        
Accounting Policies [Line Items]        
Property, plant and equipment, useful life (in years) 7 years 7 years    
Leasehold Improvements | Minimum        
Accounting Policies [Line Items]        
Property, plant and equipment, useful life (in years) 6 years 6 years    
Leasehold Improvements | Maximum        
Accounting Policies [Line Items]        
Property, plant and equipment, useful life (in years) 15 years 15 years    
Customer Concentration Risk | Sales Revenue, Net | Customer One        
Accounting Policies [Line Items]        
Percentage of concentration risk   15.00% 12.00%  
Number of major customers | customer   1 2  
Customer Concentration Risk | Sales Revenue, Net | Customer Two        
Accounting Policies [Line Items]        
Percentage of concentration risk     11.00%  
Customer Concentration Risk | Sales Revenue, Net | Three Customers And Their Direct Subcontractors        
Accounting Policies [Line Items]        
Percentage of concentration risk   41.00% 39.00%  
Number of major customers | customer   3 3  
Customer Concentration Risk | Sales Revenue, Net | Major Customer One and Their Subcontractors        
Accounting Policies [Line Items]        
Percentage of concentration risk   15.00% 13.00%  
Customer Concentration Risk | Sales Revenue, Net | Major Customer Two and Their Subcontractors        
Accounting Policies [Line Items]        
Percentage of concentration risk   15.00% 13.00%  
Customer Concentration Risk | Sales Revenue, Net | Major Customer Three and Their Subcontractors        
Accounting Policies [Line Items]        
Percentage of concentration risk   11.00% 13.00%  
Customer Concentration Risk | Accounts Receivable | Customer One        
Accounting Policies [Line Items]        
Percentage of concentration risk     11.00%  
Number of major customers | customer     1  
Customer Concentration Risk | Accounts Receivable | Three Customers And Their Direct Subcontractors        
Accounting Policies [Line Items]        
Percentage of concentration risk   22.00% 13.00%  
Number of major customers | customer   2 1