Note 6 - Long-term Debt - Summary of Long-term Debt (Details) - USD ($)	Aug. 31, 2023	May 31, 2023
Long-Term Debt, Gross	$ 15,215,080	$ 17,253,279
Debt issuance costs, net of amortization	(95,647)	(84,022)
Total debt, net of debt issuance costs	15,119,433	17,169,257
Less: Current portion of long-term debt	(2,260,829)	(2,249,570)
Long-Term Debt, net of current portion and debt issuance costs	12,858,604	14,919,687
Term Loans Due July 29, 2027 [Member]
Long-Term Debt, Gross	13,894,957	14,334,736
Revolving Loan Payable Due July 29, 2024 [Member]
Long-Term Debt, Gross	0	1,500,000
Term Loan Payable Due March 19, 2025 [Member]
Long-Term Debt, Gross	508,054	585,536
Term Loan Payable Due August 10, 2028 [Member]
Long-Term Debt, Gross	748,410	759,639
Other Debt [Member]
Long-Term Debt, Gross	$ 63,659	$ 73,368