Note 10 - Income Tax (Details Textual) - USD ($)	12 Months Ended
Note 10 - Income Tax (Details Textual) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Income Tax Expense (Benefit), Total	$ 0	$ 0
Domestic Tax Authority [Member] \| Internal Revenue Service (IRS) [Member]
Effective Income Tax Rate Reconciliation, Percent, Total	21.00%
Operating Loss Carryforwards	$ 6,356,000
Domestic Tax Authority [Member] \| Internal Revenue Service (IRS) [Member] \| Prior to 2017 [Member]
Operating Loss Carryforwards	4,337,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	$ 3,289,000
State and Local Jurisdiction [Member] \| California Franchise Tax Board [Member]
Effective Income Tax Rate Reconciliation, Percent, Total	8.84%

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.