Note 13 - Retirement, Savings and Deferred Compensation Plans - Amounts Recognized in Accumulated Other Comprehensive Loss (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	Mar. 31, 2025	Mar. 31, 2024
Prior service cost	$ 113	$ 132
Net loss	(3,248)	(3,303)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	$ (3,135)	$ (3,171)