Note 6 - Income Taxes (Details Textual)	Sep. 30, 2021 USD ($)
Deferred Tax Assets, Valuation Allowance, Total	$ 0
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total	603,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Subject to Expiration	427,000
Foreign Tax Authority [Member]
Operating Loss Carryforwards, Subject to Expiration	$ 2,800,000