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Note 6 - Shareholders' Equity (Details Textual) - $ / shares	3 Months Ended			9 Months Ended
	Mar. 31, 2023	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)				(0)
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in dollars per share)				$ 0
Common Stock [Member]
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares)	247,961			247,961
Share-based Compensation Arrangements by Share-based Payment Award, Other than Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)				$ 1.38
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)		198,943	35,000		233,943
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in dollars per share)					$ 1.72

X

- Definition

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

+ References

No definition available.

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

+ References

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-Topic 718
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-Section 50
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Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

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