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Note 10 - Common Stock Warrants and Warrant Liabilities (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025	Jan. 16, 2026	Oct. 31, 2025	Oct. 16, 2025	Oct. 15, 2025	Sep. 27, 2024	Jul. 29, 2024	Nov. 01, 2022
Proceeds from Warrant Exercises		$ 292	$ 614
Fair Value Adjustment of Warrants		$ (5,837,607)	(0)
Warrant Liabilities, Fair Value Disclosure	$ 0		0
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 0.06
Payments for Repurchase of Warrants		$ (0)	$ 1,815
The January 2026 Warrants [Member]
Fair Value Adjustment of Warrants		$ 5,300,000
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 0.05		$ 0.05
October 2025 Pre-Funded Warrants [Member]
Warrant Liabilities, Fair Value Disclosure		$ 33,700
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 0.002385			$ 0.002385	$ 5.5	$ 0.05
Maximum Percentage of Common Stock Outstanding						9.90%
Class of Warrant or Right, Number of Securities Called by Warrants or Rights					22,664,040
The July 2024 Series F-1 and F-3 Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights								$ 3.3	$ 5.5
Payments for Repurchase of Warrants	$ 2,000
Series F-1 Warrants [Member]
Maximum Percentage of Common Stock Outstanding									4.99%
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	254,545		254,545
Series F-1 Warrants [Member] | Election of the holder prior to the date of issuance [Member]
Maximum Percentage of Common Stock Outstanding									9.99%
Series F-3 Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	148,988		148,988
The November 2022 A-1 Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 1,102.5								$ 1,102.5

X

- Definition

Represents maximum percentage of common stock outstanding.

+ References

No definition available.

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X

- Definition

The fair value of warrant obligations.

+ References

No definition available.

+ Details

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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

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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X

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-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

Amount of expense (income) related to adjustment to fair value of warrant liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

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X

- Definition

The aggregate amount paid by the entity to reacquire the right to purchase equity shares at a predetermined price, usually issued together with corporate debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 15
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-15

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X

- Definition

The cash inflow associated with the amount received from holders exercising their stock warrants.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

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