Note 14 - Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Net earnings	$ 2,240	$ 5,028	$ (675)	$ 2,567	$ 7,268	$ 1,892
Less: Allocation to unvested restricted stock units	30		1		97	8
Net earnings (loss) attributable to common shareholders	$ 2,210		$ (676)		$ 7,171	$ 1,884
Weighted average common shares outstanding (in shares)	6,965,880		6,939,416		6,965,880	6,939,312