Note 14 - Lease Right-to-use - Lease Cost (Details) - USD ($) $ in Thousands	6 Months Ended
	Oct. 31, 2024	Oct. 31, 2023
Amortization of right-of-use assets	$ 98	$ 95
Interest on lease liabilities	107	94
Total finance lease cost	$ 205	$ 189
Weighted average remaining lease term - Financing leases (in years) (Year)	38 years	44 years
Weighted average discount rate - Financing leases	5.90%	5.80%