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Note 11 - Common Stock Warrants - Warrants Outstanding (Details) - $ / shares shares in Thousands	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	May 31, 2023	Dec. 31, 2022	Nov. 10, 2022	Nov. 30, 2021	Jul. 31, 2020
Exercise price (in dollars per share)	$ 37.4		$ 50.96	$ 76.23		$ 269.54
Warrants outstanding (in shares)	224,777		210,946	210,942		65,886
The 2019 Ladenburg Warrants [Member]
Exercise price (in dollars per share)	$ 1,212.75
Expiration date	Aug. 08, 2024
Warrants outstanding (in shares)	138
The July 2020 Warrants [Member]
Exercise price (in dollars per share)	$ 2,021.25								$ 2,021.25
Expiration date	Jan. 22, 2026
Warrants outstanding (in shares)	1,714
The Amended July 2020 Warrants [Member]
Exercise price (in dollars per share)	$ 52.5
Expiration date	Jan. 22, 2026
Warrants outstanding (in shares)	2,206
TLF Bio Innovation 2021 Warrants [Member]
Exercise price (in dollars per share)	$ 822.96
Expiration date	Jan. 15, 2026
Warrants outstanding (in shares)	13
The November 2021 Warrants [Member]
Exercise price (in dollars per share)	$ 220.5							$ 649.25
Expiration date	Sep. 11, 2028
Warrants outstanding (in shares)	7,654
The Amended November 2021 Warrants [Member]
Exercise price (in dollars per share)	$ 52.5
Expiration date	Sep. 11, 2028
Warrants outstanding (in shares)	15,308
The September 2022 Warrants [Member]
Exercise price (in dollars per share)	$ 220.5
Expiration date	Sep. 11, 2028
Warrants outstanding (in shares)	2,552
The Amended September 2022 Warrants [Member]
Exercise price (in dollars per share)	$ 52.5
Expiration date	Sep. 11, 2028
Warrants outstanding (in shares)	1,715
The November 2022 A-1 Warrants [Member]
Exercise price (in dollars per share)	$ 220.5				$ 52.5		$ 220.5
Expiration date	Nov. 20, 2028
Warrants outstanding (in shares)	2,268
The December 2023 Warrants [Member]
Exercise price (in dollars per share)	$ 8.75		$ 8.75
Expiration date	Jun. 21, 2029
Warrants outstanding (in shares)	72,256
March 2024 Warrant [Member]
Exercise price (in dollars per share)	$ 4.9	$ 4.9
Expiration date	Mar. 24, 2029
Warrants outstanding (in shares)	28,572
June 2024 Warrant [Member]
Exercise price (in dollars per share)	$ 2.57
Expiration date	Dec. 17, 2029
Warrants outstanding (in shares)	90,381

X

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

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X

- Definition

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+ References

No definition available.

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X

- Definition

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-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

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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