Annual report pursuant to Section 13 and 15(d)

Note 10 - Debt (Details Textual)

v3.23.3
Note 10 - Debt (Details Textual)
1 Months Ended 12 Months Ended
Apr. 27, 2022
USD ($)
Mar. 31, 2021
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2023
EUR (€)
Sep. 30, 2022
USD ($)
Sep. 30, 2022
EUR (€)
Senior Loan Agreement [Member]            
Debt Instrument, Face Amount   $ 2,000,000        
Debt Instrument, Term (Year)   3 years        
Debt Instrument, Covenant, Interest Payment Cap   5.00%        
Debt Instrument, Covenant, Interest Penalty   2.00%        
Long-Term Debt     $ 2,112,000 € 2,000,000 $ 1,966,000 € 2,000,000
Revolving Credit Facility [Member] | Loan and Security Agreement With Bremer Bank, National Association [Member]            
Line of Credit Facility, Maximum Borrowing Capacity $ 40,000,000          
Debt Instrument, Minimum Interest Rate Required 1.80%          
Debt Instrument, Interest Rate During Period     7.18%      
Debt Instrument, Covenant, Minimum Debt Service Coverage Ratio 1.2          
Debt Instrument, Covenant, Maximum Debt to Cash Flow Ratio 2          
Long-Term Line of Credit         $ 16,700,000  
Debt Instrument, Collateral Amount     $ 335,412,000      
Revolving Credit Facility [Member] | Loan and Security Agreement With Bremer Bank, National Association [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]            
Debt Instrument, Basis Spread on Variable Rate 1.85%