Note 6 - Long-term Debt - Summary of Long-term Debt (Details) - USD ($)	Nov. 30, 2023	May 31, 2023
Long-Term Debt, Gross	$ 14,669,888	$ 17,253,279
Debt issuance costs, net of amortization	(94,244)	(84,022)
Total debt, net of debt issuance costs	14,575,644	17,169,257
Less: Current portion of long-term debt	(2,321,333)	(2,249,570)
Long-Term Debt, net of current portion and debt issuance costs	12,254,311	14,919,687
Term Loans Due July 29, 2027 [Member]
Long-Term Debt, Gross	13,449,109	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	429,840	585,536
Term Loan Payable Due August 10, 2028 [Member]
Long-Term Debt, Gross	737,080	759,639
Other Debt [Member]
Long-Term Debt, Gross	$ 53,859	$ 73,368