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Note 6 - Convertible Promissory Note (Details Textual) - USD ($)			3 Months Ended		9 Months Ended
	Jul. 31, 2023	Jan. 31, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2023	Dec. 31, 2022	Jul. 23, 2019
Amortization of Debt Discount (Premium)					$ 5,396,000	$ 1,897,000
The July 2019 Note [Member] \| Convertible Debt [Member]
Debt Instrument, Face Amount			$ 397,000		$ 397,000			$ 1,000,000	$ 1,000,000
Debt Instrument, Interest Rate, Stated Percentage			24.00%		24.00%			24.00%	24.00%
Debt Instrument, Convertible, Conversion Price	$ 1.07	$ 2.87	$ 1.07		$ 1.07		$ 2.65	$ 6.30
Long-Term Debt, Fair Value	$ 538,000	$ 1,239,000
Liabilities, Fair Value Adjustment	$ 87,000	$ 239,000
Debt Instrument, Unamortized Discount							$ 43,000
Interest Expense, Debt			$ 24,000	$ 60,000	$ 90,000	$ 180,000
Antidilutive Triggering Event [Member] \| Convertible Debt [Member]
Amortization of Debt Discount (Premium)			$ 35,000		$ 190,000