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Note 7 - Shareholders' Equity (Details Textual) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Stock Issued During Period, Shares, Conversion of Convertible Securities (in shares)				223,463
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)				30,000
Treasury Stock, Common, Shares (in shares)	12,253,502			12,253,502		12,253,502
Treasury Stock, Value	$ 18,929,915			$ 18,929,915		$ 18,929,915
Common Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)				666,578
Share-based Compensation Arrangements by Share-based Payment Award, Other than Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)	$ 1.61			$ 1.61	$ 1.38
Stock Issued During Period, Shares, Conversion of Convertible Securities (in shares)	223,463
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares)	61,793	375,753	247,961	61,793	247,961
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)	5,569			5,569

X

- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of other than options.

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Number of shares issued during the period as a result of the conversion of convertible securities.

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

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