Note 14 - Lease Right-to-use - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2024	Jul. 31, 2023
Amortization of right-of-use assets	$ 48	$ 47
Interest on lease liabilities	50	48
Total finance lease cost	$ 98	$ 95
Weighted average remaining lease term - Financing leases (in years) (Year)	38 years	44 years
Weighted average discount rate - Financing leases	5.90%	5.80%