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Note 7 - Net Loss Per Share (Details Textual) - $ / shares	Sep. 30, 2025	Jun. 05, 2025	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2023	Mar. 30, 2023
Series F Preferred Stock [Member]
Preferred Stock, Convertible, Conversion Price (in dollars per share)	$ 3.77	$ 3.77	$ 11.17	$ 11.17	$ 13.6	$ 68.4

X

- Definition

Per share conversion price of preferred stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesFPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: