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Note 7 - Convertible Promissory Note (Details Textual) - USD ($)	1 Months Ended			3 Months Ended	12 Months Ended
	Jan. 31, 2024	Jul. 31, 2023	Jan. 31, 2023	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 01, 2023	Mar. 15, 2023	Jul. 23, 2019
Common Stock, Par or Stated Value Per Share					$ 0.001	$ 0.001		$ 0.001
Amortization of Debt Discount (Premium)					$ 8,305,000	$ 3,487,000
Convertible Debt [Member] \| The July 2019 Note [Member]
Debt Instrument, Face Amount					$ 397,000	$ 1,000,000			$ 1,000,000
Debt Instrument, Interest Rate, Stated Percentage					24.00%	24.00%			24.00%
Debt Instrument, Convertible, Conversion Price		$ 1.07	$ 2.87	$ 2.65	$ 0.79	$ 6.3	$ 1.07
Long-Term Debt, Fair Value		$ 538,000	$ 1,239,000
Liabilities, Fair Value Adjustment		$ 87,000	$ 239,000
Debt Conversion, Converted Instrument, Amount				$ 603,000
Debt Conversion, Converted Instrument, Shares Issued				215,000
Debt Instrument, Unamortized Discount				$ 43,000	$ 56,000
Common Stock, Par or Stated Value Per Share					$ 0.001
Share Price					$ 0.79
Amortization of Debt Discount (Premium)					$ 101,000	$ 74,000
Interest Expense, Debt, Total					114,000	240,000
Interest Payable					$ 94,000	$ 120,000
Convertible Debt [Member] \| The July 2019 Note [Member] \| Subsequent Event [Member]
Repayments of Debt	$ 397,000