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Note 5 - Stockholders' Equity (Details Textual) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($) $ / shares shares	Mar. 31, 2024 USD ($) $ / shares	Dec. 31, 2024 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 | $	$ 8	$ 8
Common Stock, Capital Shares Reserved for Future Issuance (in shares)	1,000,000		3,000,000
401(k) Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance (in shares)	10,000,000		10,000,000
O 2025 Q1 Dividends [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ / shares	$ 0.08
O 2024 Q1 Dividends [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ / shares		$ 0.08
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)	1,000,000		1,000,000
Class A Common Stock (No Par Value) [Member] | O 2025 Q1 Dividends [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ / shares	$ 0.08

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- Definition

With regard to the voting rights of a particular class of common stock, represents the number of votes per share to which shareholders are entitled.

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Number of authorized capital units or capital shares. This element is relevant to issuers of face-amount certificates and registered investment companies.

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Aggregate number of common shares reserved for future issuance.

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-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
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Aggregate dividends declared during the period for each share of common stock outstanding.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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-Topic 210
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-Name Accounting Standards Codification
-Section S99
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-Paragraph 1
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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).

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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.

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