Note 11 - Warrant Liability - The Key Assumptions Used to Value the Warrants (Details)	Nov. 10, 2022	Sep. 09, 2022	Sep. 08, 2022	Jan. 31, 2022	Nov. 02, 2021
Measurement Input, Price Volatility [Member] | September 2022 Warrants [Member]
Warrants assumptions	0.795	0.796
Measurement Input, Price Volatility [Member] | The 2021 Warrants [Member]
Warrants assumptions				0.91	0.87
Measurement Input, Price Volatility [Member] | The Amended November 2021 Warrants [Member]
Warrants assumptions		0.796
Measurement Input, Price Volatility [Member] | The November 2021 Warrants [Member]
Warrants assumptions	0.795	0.796	0.796
Measurement Input, Price Volatility [Member] | Amended July 2020 Warrants [Member]
Warrants assumptions	0.795	0.796	0.796
Measurement Input, Expected Term [Member] | September 2022 Warrants [Member]
Warrants assumptions	5.8	6.0
Measurement Input, Expected Term [Member] | The 2021 Warrants [Member]
Warrants assumptions				6.0	6.0
Measurement Input, Expected Term [Member] | The Amended November 2021 Warrants [Member]
Warrants assumptions		6.0
Measurement Input, Expected Term [Member] | The November 2021 Warrants [Member]
Warrants assumptions	5.8	6.0	5.4
Measurement Input, Expected Term [Member] | Amended July 2020 Warrants [Member]
Warrants assumptions	3.2	3.4	3.4
Measurement Input, Risk Free Interest Rate [Member] | September 2022 Warrants [Member]
Warrants assumptions	0.0393	0.0343
Measurement Input, Risk Free Interest Rate [Member] | The 2021 Warrants [Member]
Warrants assumptions				0.0165	0.0131
Measurement Input, Risk Free Interest Rate [Member] | The Amended November 2021 Warrants [Member]
Warrants assumptions		0.0343
Measurement Input, Risk Free Interest Rate [Member] | The November 2021 Warrants [Member]
Warrants assumptions	0.0393	0.0343	0.0343
Measurement Input, Risk Free Interest Rate [Member] | Amended July 2020 Warrants [Member]
Warrants assumptions	0.0415	0.0358	0.0358
Measurement Input, Expected Dividend Rate [Member] | September 2022 Warrants [Member]
Warrants assumptions	0.000	0.000
Measurement Input, Expected Dividend Rate [Member] | The 2021 Warrants [Member]
Warrants assumptions				0.0000	0.0000
Measurement Input, Expected Dividend Rate [Member] | The Amended November 2021 Warrants [Member]
Warrants assumptions		0.0000
Measurement Input, Expected Dividend Rate [Member] | The November 2021 Warrants [Member]
Warrants assumptions	0.0000	0.0000	0.0000
Measurement Input, Expected Dividend Rate [Member] | Amended July 2020 Warrants [Member]
Warrants assumptions	0.0000	0.0000	0.0000
Measurement Input, Share Price [Member] | September 2022 Warrants [Member]
Warrants assumptions	1.40	4.55
Measurement Input, Share Price [Member] | The 2021 Warrants [Member]
Warrants assumptions				7.00	8.75
Measurement Input, Share Price [Member] | The Amended November 2021 Warrants [Member]
Warrants assumptions		4.55
Measurement Input, Share Price [Member] | The November 2021 Warrants [Member]
Warrants assumptions	1.40	4.55	3.15
Measurement Input, Share Price [Member] | Amended July 2020 Warrants [Member]
Warrants assumptions	1.05	3.50	0.70