Note 7 - Fair Value Measurements - Fair Value on Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($)	Jun. 30, 2025	Dec. 31, 2024
Total assets measured and recorded at fair value	$ 9,023,476	$ 12,203,627
Warrant liabilities	16,690	89,010
Total liabilities measured and recorded at fair value	16,690	89,010
Fair Value, Inputs, Level 1 [Member]
Total assets measured and recorded at fair value	9,023,476	12,203,627
Fair Value, Inputs, Level 2 [Member]
Total assets measured and recorded at fair value	0	0
Fair Value, Inputs, Level 3 [Member]
Total assets measured and recorded at fair value	0	0
Warrant liabilities	16,690	89,010
Total liabilities measured and recorded at fair value	16,690	89,010
Money Market Funds [Member]
Money market funds (cash equivalents)	9,023,476	12,203,627
Money Market Funds [Member] \| Fair Value, Inputs, Level 1 [Member]
Money market funds (cash equivalents)	9,023,476	12,203,627
Money Market Funds [Member] \| Fair Value, Inputs, Level 2 [Member]
Money market funds (cash equivalents)	0	0
Money Market Funds [Member] \| Fair Value, Inputs, Level 3 [Member]
Money market funds (cash equivalents)	$ 0	$ 0

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-11

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-11

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-10

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-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

Reference 5: 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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant