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Note 13 - Warrant Liability - The Key Assumptions Used to Value the Warrants (Details)	Sep. 30, 2022	Sep. 09, 2022	Sep. 08, 2022	Dec. 31, 2021	Nov. 02, 2021	Dec. 31, 2019
Measurement Input, Price Volatility [Member] | The 2019 Domestic Warrants [Member]
Warrants assumptions						1.78
Measurement Input, Price Volatility [Member] | The 2019 Foreign Warrants [Member]
Warrants assumptions						1.78
Measurement Input, Price Volatility [Member] | The 2019 Ladenburg Warrants [Member]
Warrants assumptions						1.86
Measurement Input, Price Volatility [Member] | Amended July 2020 Warrants [Member]
Warrants assumptions	0.796	0.796	0.796
Measurement Input, Price Volatility [Member] | The 2021 Warrants [Member]
Warrants assumptions				0.87	0.849
Measurement Input, Price Volatility [Member] | The November 2021 Warrants [Member]
Warrants assumptions	0.796	0.796	0.796
Measurement Input, Price Volatility [Member] | September 2022 Warrants [Member]
Warrants assumptions	0.796	0.796
Measurement Input, Expected Term [Member] | The 2019 Domestic Warrants [Member]
Warrants assumptions						4.57
Measurement Input, Expected Term [Member] | The 2019 Foreign Warrants [Member]
Warrants assumptions						4.57
Measurement Input, Expected Term [Member] | The 2019 Ladenburg Warrants [Member]
Warrants assumptions						4.05
Measurement Input, Expected Term [Member] | Amended July 2020 Warrants [Member]
Warrants assumptions	3.3	3.4	3.4
Measurement Input, Expected Term [Member] | The 2021 Warrants [Member]
Warrants assumptions				6.0	6.2
Measurement Input, Expected Term [Member] | The November 2021 Warrants [Member]
Warrants assumptions	6.0	6.0	5.4
Measurement Input, Expected Term [Member] | September 2022 Warrants [Member]
Warrants assumptions	6.0	6.0
Measurement Input, Risk Free Interest Rate [Member] | The 2019 Domestic Warrants [Member]
Warrants assumptions						0.0025
Measurement Input, Risk Free Interest Rate [Member] | The 2019 Foreign Warrants [Member]
Warrants assumptions						0.0027
Measurement Input, Risk Free Interest Rate [Member] | The 2019 Ladenburg Warrants [Member]
Warrants assumptions						0.0022
Measurement Input, Risk Free Interest Rate [Member] | Amended July 2020 Warrants [Member]
Warrants assumptions	0.0358	0.0358	0.0358
Measurement Input, Risk Free Interest Rate [Member] | The 2021 Warrants [Member]
Warrants assumptions				0.0131	0.0129
Measurement Input, Risk Free Interest Rate [Member] | The November 2021 Warrants [Member]
Warrants assumptions	0.0343	0.0343	0.0343
Measurement Input, Risk Free Interest Rate [Member] | September 2022 Warrants [Member]
Warrants assumptions	0.0343	0.0343
Measurement Input, Expected Dividend Rate [Member] | The 2019 Domestic Warrants [Member]
Warrants assumptions						0.0000
Measurement Input, Expected Dividend Rate [Member] | The 2019 Foreign Warrants [Member]
Warrants assumptions						0.0000
Measurement Input, Expected Dividend Rate [Member] | The 2019 Ladenburg Warrants [Member]
Warrants assumptions						0.0000
Measurement Input, Expected Dividend Rate [Member] | Amended July 2020 Warrants [Member]
Warrants assumptions	0.0000	0.0000	0.0000
Measurement Input, Expected Dividend Rate [Member] | The 2021 Warrants [Member]
Warrants assumptions				0.0000	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] | September 2022 Warrants [Member]
Warrants assumptions	0.000	0.000
Measurement Input, Share Price [Member] | The 2019 Domestic Warrants [Member]
Warrants assumptions						1.18
Measurement Input, Share Price [Member] | The 2019 Foreign Warrants [Member]
Warrants assumptions						1.54
Measurement Input, Share Price [Member] | The 2019 Ladenburg Warrants [Member]
Warrants assumptions						1.17
Measurement Input, Share Price [Member] | Amended July 2020 Warrants [Member]
Warrants assumptions	0.05	0.10	0.02
Measurement Input, Share Price [Member] | The 2021 Warrants [Member]
Warrants assumptions				0.25	0.38
Measurement Input, Share Price [Member] | The November 2021 Warrants [Member]
Warrants assumptions	0.07	0.13	0.09
Measurement Input, Share Price [Member] | September 2022 Warrants [Member]
Warrants assumptions	0.07	0.13

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

+ Details

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