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Note 5 - Stockholders' Equity (Details Textual) $ / shares in Units, $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 USD ($) $ / shares shares | Mar. 31, 2021 USD ($) $ / shares | Dec. 31, 2021 shares
Capital Units, Authorized (in shares) | 245,000,000 |  |
Common Stock, Shares Authorized (in shares) | 200,000,000 |  |
Preferred Stock, Shares Authorized (in shares) | 20,000,000 |  |
Common Stock, Voting Rights, Votes Per Share | 1 |  |
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ / shares | $ 0.08 | $ 0.08 |
Dividends, Common Stock, Total | $ | $ 8,000 | $ 8,000 |
Common Stock, Capital Shares Reserved for Future Issuance (in shares) | 2,071,292 |  | 2,821,480
Class A Common Stock (No Par Value) [Member] |  |  |
Common Stock, Shares Authorized (in shares) | 25,000,000 |  | 25,000,000
Common Stock, Voting Rights, Votes Per Share | 10 |  |
Common Stock, Capital Shares Reserved for Future Issuance (in shares) | 597,074 |  | 847,522
Common Stock and Class A Common Stock [Member] |  |  |
Treasury Stock, Value, Acquired, Cost Method | $ | $ 0 |  |
Stock Repurchase Program, Authorized Amount | $ | $ 174,000 |  |

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- Definition Aggregate number of common shares reserved for future issuance. + 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 210.5-02.29) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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