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Note 4 - Shareholders' Equity and Preferred Stock (Details Textual) - USD ($) |  | 1 Months Ended | 2 Months Ended | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 27, 2019 | Mar. 31, 2020 | Jul. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021 | Nov. 14, 2019 | Nov. 26, 2014
Stock Repurchased and Retired During Period, Shares (in shares) |  |  |  | 1,005,212 | 9,928 |  |  |
Stock Repurchased and Retired During Period, Value |  |  |  | $ 65,214,000 | $ 297,000 |  |  |
Class B Preferred Units [Member] |  |  |  |  |  |  |  |
Preferred Units, Issued (in shares) |  |  |  |  |  |  | 50,500,000 |
Preferred Unit Purchase Price (in dollars per share) |  |  |  |  |  |  | $ 1.00 |
Preferred Units Issued, Percentage of Preferred Return |  |  |  |  |  |  | 16.00% |
Preferred Units Issued, Maximum Percentage Points of Preferred Return in Form of Issuance of Additional Units or Cash |  |  |  |  |  |  | 6.00% |
Additional Preferred Units Issued (in shares) |  | 50,000,000.0 |  |  |  |  |  |
Series A Preferred Stock [Member] |  |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) | 400,000 |  |  | 400,000 |  | 400,000 |  |
Preferred stock, liquidation preference | $ 40,000,000.0 |  |  | $ 40,000,000 |  | $ 40,000,000 |  |
Preferred Stock, Dividend Rate, Percentage | 6.00% |  |  |  |  |  |  |
Temporary Equity, Redemption Price Per Share (in dollars per share) | $ 100 |  |  |  |  |  |  |
Temporary Equity, Conversion Price Per Share (in dollars per share) | $ 10 |  |  |  |  |  |  |
Series B Preferred Stock [Member] | Public Offering [Member] |  |  |  |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  | 7.625% |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) |  |  | 3,188,533,000,000 |  |  |  |  |
Preferred Stock, Liquidation Preference Per Share (in dollars per share) |  |  | $ 25.00 |  |  |  |  |
Proceeds from Issuance of Preferred Stock and Preference Stock |  |  | $ 76,500,000 |  |  |  |  |
Shares Issued, Price Per Share (in dollars per share) |  |  | $ 25.00 |  |  |  |  |
Preferred Stock, Dividends Per Share, Declared (in dollars per share) |  |  | $ 1.90625 |  |  |  |  |
Dove Ventures, LLC [Member] | Senior Secured Term Loan Facility [Member] |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  | $ 40,000,000.0
Extinguishment of Debt, Amount | $ 40,000,000.0 |  |  |  |  |  |  |

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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21484-112644 + Details
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- Definition The aggregate liquidation preference (or restrictions) of stock classified as temporary equity that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. + References No definition available. + Details
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