Note 13 - Subsequent Events (Details) - Common Class B [Member]	May 12, 2025 $ / shares
Subsequent Events
Dividend payable per share	$ 0.1811
Q2 Dividends Declared
Subsequent Events
Date dividends declared	May 12, 2025
Dividends Payable, Date of Record	May 30, 2025
Dividends Payable, Date to be Paid	Jun. 13, 2025

Date the declared dividend will be paid, in YYYY-MM-DD format.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-3

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The per share amount of a dividend declared, but not paid, as of the financial reporting date.

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Date the dividend to be paid was declared, in YYYY-MM-DD format.

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Date the holder must own the stock to be entitled to the dividend, in YYYY-MM-DD format.

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
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