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Note 10 - Common Stock Warrants and Warrant Liabilities - Schedule of Stockholders' Equity Note, Warrants or Rights (Details) - $ / shares shares in Thousands	3 Months Ended
	Mar. 31, 2026	Jan. 16, 2026	Oct. 31, 2025	Oct. 16, 2025	Oct. 15, 2025	Nov. 01, 2022
Outstanding warrants (in shares)	1,098,239
Pre-Funded Warrants granted (in shares)	167,539,227
Warrants exercised (in shares)	(9,852)
Warrants expired (in shares)	(787)
Warrants issued for 5:1 reverse stock split due to rounding feature (in shares)	4
Outstanding warrants (in shares)	168,626,831
Weighted Average Price per share at March 31, 2026 (in dollars per share)	$ 0.06
The July 2020 Warrants [Member]
Outstanding warrants (in shares)	784
Warrants exercised (in shares)	0
Warrants expired (in shares)	(784)
Warrants issued for 5:1 reverse stock split due to rounding feature (in shares)	0
Outstanding warrants (in shares)	0
TLF Bio Innovation Warrants [Member]
Outstanding warrants (in shares)	3
Warrants exercised (in shares)	0
Warrants expired (in shares)	(3)
Warrants issued for 5:1 reverse stock split due to rounding feature (in shares)	0
Outstanding warrants (in shares)	0
The November 2021 Warrants [Member]
Outstanding warrants (in shares)	2,832
Warrants exercised (in shares)	0
Warrants expired (in shares)	0
Warrants issued for 5:1 reverse stock split due to rounding feature (in shares)	3
Outstanding warrants (in shares)	2,835
Weighted Average Price per share at March 31, 2026 (in dollars per share)	$ 557.65
Expiration Date	Sep. 11, 2028
September 2022 Warrants [Member]
Outstanding warrants (in shares)	332
Warrants exercised (in shares)	0
Warrants expired (in shares)	0
Warrants issued for 5:1 reverse stock split due to rounding feature (in shares)	1
Outstanding warrants (in shares)	333
Weighted Average Price per share at March 31, 2026 (in dollars per share)	$ 1,102.5
Expiration Date	Sep. 11, 2028
The November 2022 A-1 Warrants [Member]
Outstanding warrants (in shares)	454
Warrants exercised (in shares)	0
Warrants expired (in shares)	0
Warrants issued for 5:1 reverse stock split due to rounding feature (in shares)	0
Outstanding warrants (in shares)	454
Weighted Average Price per share at March 31, 2026 (in dollars per share)	$ 1,102.5					$ 1,102.5
Expiration Date	Nov. 20, 2028
The December 2023 Warrants [Member]
Outstanding warrants (in shares)	5,341
Warrants exercised (in shares)	(5,341)
Warrants expired (in shares)	0
Warrants issued for 5:1 reverse stock split due to rounding feature (in shares)	0
Outstanding warrants (in shares)	0
June 2024 Warrant [Member]
Outstanding warrants (in shares)	4,511
Warrants exercised (in shares)	(4,511)
Warrants expired (in shares)	0
Warrants issued for 5:1 reverse stock split due to rounding feature (in shares)	0
Outstanding warrants (in shares)	0
The July 2024 Series F-1 Warrants [Member]
Outstanding warrants (in shares)	2,900
Warrants issued for 5:1 reverse stock split due to rounding feature (in shares)	0
Outstanding warrants (in shares)	2,900
Weighted Average Price per share at March 31, 2026 (in dollars per share)	$ 3.3
Expiration Date	Jul. 30, 2029
October 2025 Pre-Funded Warrants [Member]
Outstanding warrants (in shares)	1,081,082
Pre-Funded Warrants granted (in shares)	0
Warrants exercised (in shares)	0
Warrants expired (in shares)	0
Warrants issued for 5:1 reverse stock split due to rounding feature (in shares)	0
Outstanding warrants (in shares)	1,081,082
Weighted Average Price per share at March 31, 2026 (in dollars per share)	$ 0.002385		$ 0.002385	$ 5.5	$ 0.05
The January 2026 Warrants [Member]
Outstanding warrants (in shares)	0
Pre-Funded Warrants granted (in shares)	167,539,227
Warrants exercised (in shares)	0
Warrants expired (in shares)	0
Warrants issued for 5:1 reverse stock split due to rounding feature (in shares)	0
Outstanding warrants (in shares)	167,539,227
Weighted Average Price per share at March 31, 2026 (in dollars per share)	$ 0.05	$ 0.05

X

- Definition

The number of warrants or rights exercised during period.

+ References

No definition available.

+ Details

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+ References

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X

- Definition

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+ References

No definition available.

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+ 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

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

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- Definition

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- 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
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-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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