Note 2 - Summary of Significant Accounting Policies - Financial Assets Measured at Fair Value (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Fair Value, Inputs, Level 2 [Member]
Fair value of warrant liabilities	$ 0	$ 0
Fair Value, Inputs, Level 3 [Member]
Fair value of warrant liabilities	1	109
Warrant Liability [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair value of warrant liabilities	$ 0	$ 0

Fair value of financial and nonfinancial obligations.

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

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

Name:	us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant