Note 6 - Leases - Summary of Lease Activity (Details) - USD ($)	12 Months Ended
	May 31, 2024	May 31, 2023
Amortization of right-of-use assets	$ 24,312	$ 197,626
Interest on lease liabilities	1,719	24,927
Operating lease expense	609,976	501,712
Short-term lease expense	1,512,438	1,532,005
Total	2,296,978	2,256,270
Operating cash flows	26,031	24,927
Financing cash flows	37,342	578,151
Operating cash flows	583,807	478,881
Right-of-use assets obtained in exchange for lease liability – operating lease	$ 354,041	$ 5,516,006
Financing leases (Year)	1 year 2 months 12 days	1 year 8 months 12 days
Operating leases (Year)	12 years 8 months 12 days	14 years 1 month 6 days
Financing leases	4.00%	4.40%
Operating leases	6.10%	6.00%