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Note 5 - Common Stock (Details Textual) - $ / shares	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Common Stock, Shares Authorized (in shares)	50,000,000		50,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.001		$ 0.001
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)	108,451	2,500
The Two Thousand Eighteen Equity Incentive Plan Member
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)	108,451	2,500

X

- Definition

Face amount or stated value per share of common stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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X

- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04(16)(a))
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- Definition

Number of share options (or share units) exercised during the current period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
-Publisher FASB
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-Section S99
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-Topic 718
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