Note 5 - Fair Value Measurements - Reconciliation of Changes in Fair Value of Liability (Details) $ in Thousands	9 Months Ended
Sep. 30, 2025 USD ($)
Convertible Notes [Member]
Issuance of convertible notes payable	$ 8,566
Principal payments	(2,200)
Change in fair value	(3,776)
Balance at September 30, 2025	2,590
Fair Value, Balance	2,590
Change in fair value of July 2025 ELOC commitment note	(3,776)
Common Stock Warrant Liability [Member]
Change in fair value	(292)
Balance at September 30, 2025	2
Fair Value, Balance	305
Settlement of common stock warrant liability	(20)
Deemed dividend	9
Fair Value, Balance	2
Change in fair value of July 2025 ELOC commitment note	(292)
Derivative Financial Instruments, Liabilities [Member]
Issuance of convertible notes payable	5,702
Balance at September 30, 2025	5,089
Fair Value, Balance	299
Settlement of common stock warrant liability	(111)
Fair Value, Balance	5,089
Derivative Financial Instruments, Liabilities [Member] \| June 2024 ELOC Commitment Note [Member]
Change in fair value	(188)
Change in fair value of July 2025 ELOC commitment note	(188)
Derivative Financial Instruments, Liabilities [Member] \| July 2025 ELOC Commitment Note [Member]
Change in fair value	(613)
Change in fair value of July 2025 ELOC commitment note	$ (613)

Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

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

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Amount of issuances of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
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-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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Amount of deemed dividends classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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