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Note 7 - Stockholders' Equity - Schedule of Stock by Class (Details) - shares shares in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Series B Preferred Stock, Authorized (in shares) | 65,000 |
Series B Preferred Stock, Shares Issued (in shares) | 1,270 | 1,275
Series B Preferred Stock [Member] |  |
Series B Preferred Stock, Authorized (in shares) | 7,235 |
Series B Preferred Stock, Shares Issued (in shares) | 1,270 | 1,275
Undesignated [Member] |  |
Series B Preferred Stock, Authorized (in shares) | 57,765 |
Series B Preferred Stock, Shares Issued (in shares) | 0 | 0

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- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: 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 + Details
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- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644 + Details
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