Note 6 - Income Taxes - Components of Income Tax Provision (Details) - USD ($)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
State	$ 0	$ 0
Total current	0	0
Federal	0	234,000
State	0	39,000
Total deferred	0	273,000
Income tax expense	$ (0)	$ 273,000

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

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Amount of current state and local tax expense (benefit) attributable to income (loss) from continuing operations. Includes, but is not limited to, current regional, territorial, and provincial tax expense (benefit) for non-US (United States of America) jurisdiction.

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Amount of deferred federal tax expense (benefit) attributable to income (loss) from continuing operations. Includes, but is not limited to, deferred national tax expense (benefit) for non-US (United States of America) jurisdiction.

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