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Note 6 - Share-based Compensation - Noncash Stock Option Compensation (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Stock-based compensation	$ 247,390	$ 281,307	$ 851,471	$ 946,262
Share based compensation expense - stock option	247,390	281,307	851,471	946,262
Share-Based Payment Arrangement, Option [Member]
Stock-based compensation	200,387	224,749	634,194	779,663
Share based compensation expense - stock option	200,387	224,749	634,194	779,663
Restricted Stock Units (RSUs) [Member]
Stock-based compensation	47,003	56,558	217,277	166,599
Share based compensation expense - stock option	47,003	56,558	217,277	166,599
General and Administrative Expense [Member]
Stock-based compensation	(235,024)	(270,672)	(814,430)	(913,804)
Share based compensation expense - stock option	(235,024)	(270,672)	(814,430)	(913,804)
Research and Development Expense [Member]
Stock-based compensation	12,366	10,635	37,041	32,458
Share based compensation expense - stock option	$ 12,366	$ 10,635	$ 37,041	$ 32,458

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 S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1

Reference 2: 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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