Note 14 - Lease Right-to-use - Lease Cost (Details) - USD ($) $ in Thousands	9 Months Ended
	Jan. 31, 2025	Jan. 31, 2024
Amortization of right-of-use assets	$ 148	$ 142
Interest on lease liabilities	163	140
Total finance lease cost	$ 311	$ 282
Weighted average remaining lease term - Financing leases (in years) (Year)	38 years	44 years
Weighted average discount rate - Financing leases	5.90%	5.80%