Note 12 - Income Tax Provision (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 0
Deferred Tax Assets, Valuation Allowance	3,787	$ 3,467
Unrecognized Tax Benefits	3,500
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	300
Domestic Tax Jurisdiction [Member]
Operating Loss Carryforwards	9,900
Operating Loss Carryforwards, Subject to Expiration	3,500
Operating Loss Carryforwards, Not Subject To Expiration	$ 8,800
Open Tax Year	2017 2018 2019 2020 2021 2022 2023 2024
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	$ 17,100
Open Tax Year	2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024