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Note 6 - Convertible Promissory Note (Details Textual) - USD ($)		3 Months Ended		9 Months Ended
	Jul. 23, 2019	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jul. 25, 2022	Dec. 31, 2021
Amortization of Debt Discount (Premium)				$ 1,897,000	$ 2,723,000
Interest Expense, Debt, Total		$ 60,000
Convertible Debt [Member] \| The July 2019 Note [Member]
Debt Instrument, Face Amount	$ 1,000,000
Debt Instrument, Convertible, Conversion Price	$ 1.80	$ 0.21		$ 0.21		$ 0.21	$ 0.91
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger	90.00%
Debt Instrument, Interest Rate, Stated Percentage	24.00%	24.00%		24.00%			24.00%
Long-Term Debt, Fair Value		$ 1,020,000		$ 1,020,000
Amortization of Debt Discount (Premium)			$ 80,000		241,000
Interest Expense, Debt, Total			$ 60,000	$ 180,000	$ 180,000
Convertible Debt [Member] \| The July 2019 Note [Member] \| Minimum [Member]
Debt Instrument, Convertible, Conversion Price	$ 0.50