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Note 3 - Long Term Debt Financing (Details Textual)
3 Months Ended 9 Months Ended
Jan. 25, 2024
USD ($)
Apr. 09, 2021
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Mar. 31, 2024
Dec. 31, 2023
USD ($)
Long-Term Debt     $ 14,375,000   $ 14,375,000      
Amortization of Debt Issuance Costs     19,000 $ 7,000 77,000 $ 44,000    
Debt Issuance Costs, Net     184,000   184,000     $ 164,000
The Credit Agreement [Member] | Fifth Third Bank, N.A. [Member]                
Line of Credit Facility, Maximum Borrowing Capacity   $ 22,000,000            
Number of Debt Instruments   3            
Debt Instrument, Covenant, Minimum Fixed Charge Coverage Ratio   1.25            
Debt Instrument, Covenant, Maximum Funded Debt to EDITDA Ratio   3            
The Credit Agreement, First Loan and Second Loan Facility [Member] | Fifth Third Bank, N.A. [Member]                
Debt Instrument, Face Amount   $ 9,500,000            
Long-Term Debt     12,588,000   12,588,000     10,825,000
The Credit Agreement, Second Loan Facility [Member] | Fifth Third Bank, N.A. [Member]                
Debt Instrument, Face Amount   5,500,000            
The Credit Agreement, Third Loan Facility [Member] | Fifth Third Bank, N.A. [Member] | Revolving Credit Facility [Member]                
Line of Credit Facility, Maximum Borrowing Capacity   $ 7,000,000            
Long-Term Line of Credit     4,500,000   4,500,000      
Debt Instrument, Term (Year)   5 years            
The Credit Agreement, Third Loan Facility [Member] | Fifth Third Bank, N.A. [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate [Member]                
Debt Instrument, Basis Spread on Variable Rate   3.00%            
The Credit Agreement, 2024 Supplemental Term Loan [Member] | Fifth Third Bank, N.A. [Member]                
Debt Instrument, Face Amount $ 2,700,000              
Debt Issuance Costs, Gross     $ 97,000   $ 97,000      
The Credit Agreement, 2024 Supplemental Term Loan [Member] | Fifth Third Bank, N.A. [Member] | Secured Overnight Financing Rate (SOFR) [Member]                
Debt Instrument, Basis Spread on Variable Rate 3.00%              
Debt Instrument, Variable Rate, Floor 0.00%              
DFC Loan, Tranche One [Member]                
Debt Instrument, Interest Rate, Stated Percentage     3.67%   3.67%      
DFC Loan, Tranche Two [Member]                
Debt Instrument, Interest Rate, Stated Percentage             7.49%  
DFC Loan [Member]                
Long-Term Debt     $ 1,970,000   $ 1,970,000     2,464,000
Debt Issuance Costs, Gross     $ 0   $ 0     $ 9,000