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

Note 7 - Concentrations (Details Textual)

v3.25.3
Note 7 - Concentrations (Details Textual)
12 Months Ended
Sep. 30, 2025
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2023
Property, Plant and Equipment, Net $ 9,682,000 $ 15,871,000  
MEXICO      
Property, Plant and Equipment, Net $ 4,507,000 $ 5,395,000  
Revenue Benchmark [Member] | Customer Concentration Risk [Member]      
Number of Major Customers 2    
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer A [Member]      
Concentration Risk, Percentage 18.00%   19.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer B [Member]      
Concentration Risk, Percentage 13.00% 15.00% 10.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer One [Member]      
Concentration Risk, Percentage   20.00%  
Accounts Receivable [Member] | Customer Concentration Risk [Member]      
Number of Major Customers 2    
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer A [Member]      
Concentration Risk, Percentage 11.00%    
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer B [Member]      
Concentration Risk, Percentage 17.00% 16.00%