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Note 6 - Stock-Based Compensation Expense - Schedule of Stock-Based Compensation Expense 2 (Details) - Share-Based Payment Arrangement, Option [Member] - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Total stock-based compensation expense	$ 163,746	$ 292,740	$ 383,063	$ 585,484
Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense
Total stock-based compensation expense	56,075	162,417	167,215	324,845
Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense
Total stock-based compensation expense	$ 107,671	$ 130,323	$ 215,848	$ 260,639

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

+ Details

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

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementOfIncomeLocationBalanceAxis=us-gaap_GeneralAndAdministrativeExpense
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementOfIncomeLocationBalanceAxis=us-gaap_ResearchAndDevelopmentExpense
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: