Note 6 - Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Operating Lease, Right-of-Use Asset	$ 5,108	$ 2,841
Total right-of-use assets	5,108	2,841
Operating lease liability, current	750	160
Operating lease liability, non-current	4,466	2,752
Total lease liabilities	$ 5,216	$ 2,912