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Note 5 - Stockholders' Equity - Schedule of Stock Warrants (Details)	Jun. 30, 2026 $ / shares shares
Number of Shares (in shares)	8,541,959
September 2021 Warrants [Member]
Number of Shares (in shares)	268
Exercise Price (in dollars per share) | $ / shares	$ 4,875
Warrants Issued in July 2025 Offering [Member]
Number of Shares (in shares)	490,000
Exercise Price (in dollars per share) | $ / shares	$ 4.35
Warrants Issued in September 2025 Offering [Member]
Number of Shares (in shares)	79,732
Exercise Price (in dollars per share) | $ / shares	$ 1.1877
December 2025 Offering Warrants [Member]
Number of Shares (in shares)	223,899
Exercise Price (in dollars per share) | $ / shares	$ 1.1877
February 2026 Warrants [Member]
Number of Shares (in shares)	432,902
Exercise Price (in dollars per share) | $ / shares	$ 2.31
March 2026 Warrants [Member]
Number of Shares (in shares)	1,269,316
Exercise Price (in dollars per share) | $ / shares	$ 1.36
May 2026 Warrants Expiring In June 2031 [Member]
Number of Shares (in shares)	1,558,886
Exercise Price (in dollars per share) | $ / shares	$ 1.65
May 2026 Warrants Expiring In May 2031 [Member]
Number of Shares (in shares)	3,378,380
Exercise Price (in dollars per share) | $ / shares	$ 1.48
May 2026 Warrants Expiring In November 2027 [Member]
Number of Shares (in shares)	675,674
Exercise Price (in dollars per share) | $ / shares	$ 1.45

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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