Note 5 - Income Taxes (Details Textual) - USD ($)		3 Months Ended
	Jul. 12, 2023	Jun. 30, 2023	Jun. 30, 2022
Income (Loss) from Continuing Operations before Income Taxes, Foreign		$ 302,000	$ 83,000
Deferred Tax Asset, Valuation Allowance Percent		100.00%
Deferred Tax Assets, Valuation Allowance		$ 4,906,000
Taxes, Miscellaneous		8,650	$ 10,500
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability		1,603,000
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability, Current		401,000
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability, Noncurrent		$ 1,202,000
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%
Number of Installments of Federal Tax Liability Paid		5
Subsequent Event [Member]
Payments of Federal Tax Liability	$ 401,000
Domestic Tax Authority [Member]
Operating Loss Carryforwards		$ 16.3
Percentage of Net Operation Loss Carry Forwards, Utilization Limit Against Taxable Income		80.00%
Open Tax Year		2017 2018 2019 2020 2021 2022 2023
State and Local Jurisdiction [Member]
Operating Loss Carryforwards		$ 19.5
Open Tax Year		2015 2016 2017 2018 2019 2020 2022 2023