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Note 11 - Warrant Liability - The Key Assumptions Used to Value the Warrants (Details)	Jun. 30, 2023	May 01, 2023	Apr. 27, 2023	Apr. 26, 2023	Nov. 10, 2022	Sep. 09, 2022	Sep. 08, 2022	Jun. 09, 2022	Jan. 31, 2022	Nov. 02, 2021
Measurement Input, Share Price [Member] | Series B-1 Warrant [Member]
Warrants assumptions		0.72						0.68
Measurement Input, Share Price [Member] | Series B-2 Warrant [Member]
Warrants assumptions		0.72						0.68
Measurement Input, Share Price [Member] | September 2022 Warrants [Member]
Warrants assumptions	0.72			0.72	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	0.72		0.72		1.40	4.55	3.15
Measurement Input, Share Price [Member] | Amended July 2020 Warrants [Member]
Warrants assumptions	0.72		0.72		1.05	3.50	0.70
Measurement Input, Price Volatility [Member] | Series B-1 Warrant [Member]
Warrants assumptions		0.801						0.776
Measurement Input, Price Volatility [Member] | Series B-2 Warrant [Member]
Warrants assumptions		0.801						0.776
Measurement Input, Price Volatility [Member] | September 2022 Warrants [Member]
Warrants assumptions	0.801			0.801	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	0.801		0.801		0.795	0.796	0.796
Measurement Input, Price Volatility [Member] | Amended July 2020 Warrants [Member]
Warrants assumptions	0.801		0.801		0.795	0.796	0.796
Measurement Input, Expected Term [Member] | Series B-1 Warrant [Member]
Warrants assumptions		5.1						5.0
Measurement Input, Expected Term [Member] | Series B-2 Warrant [Member]
Warrants assumptions		2.1						2.0
Measurement Input, Expected Term [Member] | September 2022 Warrants [Member]
Warrants assumptions	5.4			5.4	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	5.4		5.4		5.8	6.0	5.4
Measurement Input, Expected Term [Member] | Amended July 2020 Warrants [Member]
Warrants assumptions	2.7		2.7		3.2	3.4	3.4
Measurement Input, Risk Free Interest Rate [Member] | Series B-1 Warrant [Member]
Warrants assumptions		0.0360						0.0392
Measurement Input, Risk Free Interest Rate [Member] | Series B-2 Warrant [Member]
Warrants assumptions		0.0404						0.0459
Measurement Input, Risk Free Interest Rate [Member] | September 2022 Warrants [Member]
Warrants assumptions	0.0359			0.0359	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	0.0359		0.0359		0.0393	0.0343	0.0343
Measurement Input, Risk Free Interest Rate [Member] | Amended July 2020 Warrants [Member]
Warrants assumptions	0.0388		0.0388		0.0415	0.0358	0.0358
Measurement Input, Expected Dividend Rate [Member] | Series B-1 Warrant [Member]
Warrants assumptions		0.0000						0.0000
Measurement Input, Expected Dividend Rate [Member] | Series B-2 Warrant [Member]
Warrants assumptions		0.0000						0.0000
Measurement Input, Expected Dividend Rate [Member] | September 2022 Warrants [Member]
Warrants assumptions				0.000	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	0.0000	0.0000
Measurement Input, Expected Dividend Rate [Member] | Amended July 2020 Warrants [Member]
Warrants assumptions	0.0000		0.0000		0.0000	0.0000	0.0000
Warrant Fair Value [Member] | Series B-1 Warrant [Member]
Warrants assumptions		0.40						0.36
Warrant Fair Value [Member] | Series B-2 Warrant [Member]
Warrants assumptions		0.22						0.18

X

- Definition

Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

+ Details

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