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Note 6 - Share-based Compensation - Black-Scholes Options Pricing Model (Details)	3 Months Ended
	Mar. 31, 2024
Minimum [Member]
Risk-Free interest rate, minimum	3.93%
Expected life of options (Year)	5 years 6 months
Maximum [Member]
Risk-Free interest rate, maximum	3.94%
Expected life of options (Year)	6 years 3 months

X

- Definition

The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

No definition available.

+ Details

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X

- Definition

The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

No definition available.

+ Details

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X

- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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

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