Note 5 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Mar. 31, 2025
Deferred Tax Assets, Valuation Allowance	$ 6,927,000		$ 6,927,000
Income (Loss) from Continuing Operations before Income Taxes, Foreign	141,000	$ 218,000	485,000	$ 738,000
Income Tax Expense (Benefit)	0	$ 0	0	3,000
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability	0		0		$ 668,000
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability, Current	0		0		668,000
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability, Noncurrent	0		$ 0		$ 0
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	22.2		$ 22.2
Percentage of Net Operation Loss Carry Forwards, Utilization Limit Against Taxable Income			80.00%
Open Tax Year			2017
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	$ 23.9		$ 23.9
Open Tax Year			2015