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Note 7 - Stockholders' Equity and Stock Incentive Plans - Dividends (Details) - $ / shares	6 Months Ended
	Jun. 30, 2024	Jul. 15, 2024	Apr. 15, 2024	Jan. 15, 2024	Jul. 15, 2023	Apr. 15, 2023	Jan. 15, 2023
O 2022 Q4 Dividends [Member]
Dividends, record date	Dec. 19, 2022
Dividends, payment date	Jan. 15, 2023
Dividends, amount per share (in dollars per share)							$ 0.15
O 2023 Q1 Dividends [Member]
Dividends, record date	Mar. 15, 2023
Dividends, payment date	Apr. 15, 2023
Dividends, amount per share (in dollars per share)						$ 0.16
O 2023 Q2 Dividends [Member]
Dividends, record date	Jun. 15, 2023
Dividends, payment date	Jul. 15, 2023
Dividends, amount per share (in dollars per share)					$ 0.16
O 2023 Q4 Dividends [Member]
Dividends, record date	Dec. 22, 2023
Dividends, payment date	Jan. 15, 2024
Dividends, amount per share (in dollars per share)				$ 0.16
O 2024 Q1 Dividends [Member]
Dividends, record date	Mar. 15, 2024
Dividends, payment date	Apr. 15, 2024
Dividends, amount per share (in dollars per share)			$ 0.17
O 2024 Q2 Dividends [Member]
Dividends, record date	Jun. 15, 2024
Dividends, payment date	Jul. 15, 2024
O 2024 Q2 Dividends [Member] | Subsequent Event [Member]
Dividends, amount per share (in dollars per share)		$ 0.17

X

- Definition

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

+ References

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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X

- Definition

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

+ References

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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- Definition

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

+ References

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