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Note 8 - Stock Based Compensation (Details Textual) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Sep. 30, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 01, 2016
Time Restricted Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)		53,221
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)		3 years
Performance Restricted Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)		36,313
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)		89,534
Share-Based Payment Arrangement, Expense		$ 0.2	$ 0.1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 0.7	$ 0.7
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)		2 years 6 months
2016 Restricted Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)				500,000
2016 Restricted Stock Plan [Member] \| Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)	24,438	24,438
Long-term Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)	550,000	550,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares)	0