Note 7 - Leases (Additional Information) (Details) - USD ($) $ in Thousands		6 Months Ended
	Mar. 14, 2022	Sep. 30, 2023
Leases [Abstract]
Extension of lease term, description		On March 14, 2022, the Corporation renewed the lease agreement effective April 1, 2022, resulting in a commitment of $556 over a 24 months base lease term and 48 months additional lease renewal term. In April 2023, the Corporation elected not to renew the additional 48 months lease renewal term with the lease expected to terminate March 31, 2024
Right-of-use asset and lease liability	$ 369
Lease payments discounted incremental borrowing rate	4.30%
Payments for rent	$ 556
Lease term	24 months
Additional lease renewal term	48 months
Lease expected to terminate date	March 31, 2024