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Note 5 - Stock-Based Compensation - Weighted Average Period for Recognition of Unrecognized Compensation Cost for Stock Options and Restricted Stock (Details)	12 Months Ended
	Dec. 31, 2023
Restricted Stock [Member]
Weighted average period (in years) (Year)	9 months 3 days
Restricted Stock Units (RSUs) [Member]
Weighted average period (in years) (Year)	1 year 6 months
Performance Shares [Member]
Weighted average period (in years) (Year)	1 year 7 months 20 days

X

- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for 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 (i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

+ Details

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Period Type:	duration

X

- Details

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- Details

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- Details

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