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Note 11 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended		12 Months Ended
	Mar. 25, 2025	Mar. 24, 2025	Mar. 31, 2025	Mar. 27, 2025	Dec. 31, 2024
March 2025 Pre-funded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	2,085,115
March 2025 Common Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 1.31
At-the-Market Program [Member]
Stock Issued During Period, Shares, New Issues (in shares)			1,952,603		2,012,167
Proceeds from Issuance of Common Stock			$ 3.8		$ 4.9
March 2025 Offering [Member[
Proceeds from Issuance or Sale of Equity	$ 4.1
Subsequent Event [Member] | March 2025 Pre-funded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		2,085,115
Subsequent Event [Member] | March 24, 2025 Common Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		3,435,115
Subsequent Event [Member] | March 2025 Common Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)		$ 1.31
Subsequent Event [Member] | At-the-Market Program [Member]
Stock Issued During Period, Shares, New Issues (in shares)				1,952,603
Proceeds from Issuance of Common Stock				$ 3.8
Subsequent Event [Member] | March 2025 Offering [Member[
Stock Issued During Period, Shares, New Issues (in shares)		1,350,000
Proceeds from Issuance or Sale of Equity		$ 4.1

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 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
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-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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- 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.

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