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Note 4 - Line of Credit and Term Loans (Details Textual)
9 Months Ended
Feb. 28, 2023
USD ($)
Feb. 28, 2022
USD ($)
Jun. 29, 2021
USD ($)
Sep. 30, 2023
USD ($)
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage     0.25%  
Term Loan [Member]        
Debt Instrument, Face Amount     $ 3,153,500  
Term Loan in Connection with Northbound Acquisition [Member]        
Debt Instrument, Face Amount   $ 1,500,000    
Debt Instrument, Interest Rate, Stated Percentage   4.00%    
Debt Instrument, Term (Month)   36 months    
Obligations to Workers' Compensation Insurance Carrier [Member]        
Letters of Credit Outstanding, Amount     9,200,000  
Paycard Funding Account [Member]        
Letters of Credit Outstanding, Amount     $ 500,000  
LIBOR - London Interbank Offered Rate [Member] | Term Loan [Member]        
Debt Instrument, Basis Spread on Variable Rate     2.00%  
LIBOR - London Interbank Offered Rate [Member] | Minimum [Member]        
Debt Instrument, Basis Spread on Variable Rate     1.25%  
LIBOR - London Interbank Offered Rate [Member] | Maximum [Member]        
Debt Instrument, Basis Spread on Variable Rate     1.75%  
Base Rate [Member] | Term Loan [Member]        
Debt Instrument, Basis Spread on Variable Rate     1.00%  
Base Rate [Member] | Minimum [Member]        
Debt Instrument, Basis Spread on Variable Rate     0.25%  
Base Rate [Member] | Maximum [Member]        
Debt Instrument, Basis Spread on Variable Rate     0.75%  
Bank of America [Member] | Revolving Credit Facility [Member]        
Line of Credit Facility, Maximum Borrowing Capacity $ 50,000,000      
Line of Credit Facility, Maximum Borrowing Capacity, One-time Right, Maximum Amount $ 60,000,000      
Line of Credit, Asset Coverage Ratio 1      
Line of Credit, Total Funded Debt to Adjusted EBITDA Ratio 3      
Line of Credit, Fixed Coverage Ratio 1.25      
Debt Instrument, Interest Rate, Effective Percentage       6.60%
Gain (Loss) on Extinguishment of Debt       $ (310,000)
Bank of America [Member] | Revolving Credit Facility [Member] | BSBY Daily Floating Rate [Member] | Minimum [Member]        
Debt Instrument, Basis Spread on Variable Rate 1.00%      
Bank of America [Member] | Revolving Credit Facility [Member] | BSBY Daily Floating Rate [Member] | Maximum [Member]        
Debt Instrument, Basis Spread on Variable Rate 1.75%      
Bank of America [Member] | Standby Letters of Credit [Member]        
Line of Credit Facility, Maximum Borrowing Capacity $ 20,000,000      
Truist [Member]        
Line of Credit Facility, Maximum Borrowing Capacity $ 60,000,000   $ 60,000,000  
Letter of Credit [Member]        
Line of Credit Facility, Maximum Borrowing Capacity     $ 20,000,000