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Note 21 - Subsequent Events (Details Textual) - Subsequent Event [Member] - USD ($) $ in Millions | Feb. 29, 2024 | Jan. 31, 2024
--- | --- | ---
Stock Repurchase Program, Authorized Amount | $ 25.0 |
Glen Rock, Pennsylvania Property [Member] |  |
Real Estate, Held-for-Sale |  | $ 0.8
Common Class A [Member] |  |
Stock Repurchase Program, Authorized Amount | 4.0 |
Common Class B [Member] |  |
Stock Repurchase Program, Authorized Amount | $ 21.0 |

X
- Definition Amount of investment in land and building held for sale. Excludes real estate considered inventory. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(d)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 + Details
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Balance Type: | debit
Period Type: | instant

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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X
- Details
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X
- Details
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X
- Details
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X
- Details
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