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Note 6 - Share-based Compensation - Noncash Stock Option Compensation (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Stock-based compensation	$ 225,030	$ 306,478
Share based compensation expense - stock option	225,030	306,478
Share-Based Payment Arrangement, Option [Member]
Stock-based compensation	177,294	190,269
Share based compensation expense - stock option	177,294	190,269
Restricted Stock Units (RSUs) [Member]
Stock-based compensation	47,736	116,209
Share based compensation expense - stock option	47,736	116,209
General and Administrative Expense [Member]
Stock-based compensation	(207,996)	(294,034)
Share based compensation expense - stock option	(207,996)	(294,034)
Research and Development Expense [Member]
Stock-based compensation	17,034	12,444
Share based compensation expense - stock option	$ 17,034	$ 12,444

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479983/718-10-S45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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