Note 5 - Income Taxes (Details Textual) - USD ($)	3 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Income (Loss) from Continuing Operations before Income Taxes, Foreign	$ 272,000	$ 302,000
Deferred Tax Asset, Valuation Allowance Percent	100.00%
Deferred Tax Assets, Valuation Allowance	$ 4,597,000
Income Tax Expense (Benefit)	3,000	0
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability	1,202,000
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability, Current	534,000
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability, Noncurrent	$ 668,000
Federal Tax Liability Payable, Duration (Year)	8 years
Percentage of Federal Tax Liability Payable in First Five Installments	8.00%
Percentage of Federal Tax Liability Payable in Sixth Installment	15.00%
Percentage of Federal Tax Liability Payable in Seventh Installment	20.00%
Percentage of Federal Tax Liability Payable in Final Installment	25.00%
Accounting Standards Update 2019-12 [Member]
Income Tax Expense (Benefit)	$ 9,000	$ 9,000
Domestic Tax Jurisdiction [Member]
Operating Loss Carryforwards	$ 15.7
Open Tax Year	2017 2018 2019 2020 2021 2022 2023 2024
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	$ 15.8
Percentage of Net Operation Loss Carry Forwards, Utilization Limit Against Taxable Income	80.00%
Open Tax Year	2015 2016 2017 2018 2019 2020 2022 2023 2024