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Note 6 - Share-based Compensation - Noncash Stock Option Compensation (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Stock-based compensation	$ 297,603	$ 334,316	$ 604,081	$ 664,955
Share based compensation expense - stock option	297,603	334,316	604,081	664,955
Share-Based Payment Arrangement, Option [Member]
Stock-based compensation	243,538	278,373	433,807	554,914
Share based compensation expense - stock option	243,538	278,373	433,807	554,914
Restricted Stock Units (RSUs) [Member]
Stock-based compensation	54,065	55,943	170,274	110,041
Share based compensation expense - stock option	54,065	55,943	170,274	110,041
General and Administrative Expense [Member]
Stock-based compensation	285,372	323,796	579,406	643,132
Share based compensation expense - stock option	285,372	323,796	579,406	643,132
Research and Development Expense [Member]
Stock-based compensation	12,231	10,520	24,675	21,823
Share based compensation expense - stock option	$ 12,231	$ 10,520	$ 24,675	$ 21,823

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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