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Note 4 - Shareholders' Equity and Preferred Stock (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Stock Repurchased and Retired During Period, Shares (in shares)	72,354	1,005,212
Stock Repurchased and Retired During Period, Value	$ 1,947,000	$ 65,214,000
Series B Preferred Stock [Member]
Stock Repurchased and Retired During Period, Shares (in shares)	1,806	0
Stock Repurchased and Retired During Period, Value	$ 29,000	$ 0
Series B Preferred Stock [Member] | Public Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)	51,327	0
Proceeds from Issuance of Preferred Stock and Preference Stock	$ 1.1	$ 0.0

X

- Definition

Proceeds from issuance of capital stock which provides for a specific dividend that is paid to the shareholders before any dividends to common stockholders and which takes precedence over common stockholders in the event of liquidation.

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Number of new stock issued during the period.

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