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Note 7 - Stockholders' Equity and Stock Incentive Plans - Dividends (Details) - $ / shares | 9 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2025 | Oct. 15, 2025 | Jul. 15, 2025 | Apr. 15, 2025 | Jan. 15, 2025 | Oct. 15, 2024 | Jul. 15, 2024 | Apr. 15, 2024 | Jan. 15, 2024
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 |  |  |  |  |  |  |  |
Dividends, amount per share (in dollars per share) |  |  |  |  |  |  | $ 0.17 |  |
O 2024 Q3 Dividends [Member] |  |  |  |  |  |  |  |  |
Dividends, record date | Sep. 15, 2024 |  |  |  |  |  |  |  |
Dividends, payment date | Oct. 15, 2024 |  |  |  |  |  |  |  |
Dividends, amount per share (in dollars per share) |  |  |  |  |  | $ 0.17 |  |  |
O 2024 Q4 Dividends [Member] |  |  |  |  |  |  |  |  |
Dividends, record date | Dec. 16, 2024 |  |  |  |  |  |  |  |
Dividends, payment date | Jan. 15, 2025 |  |  |  |  |  |  |  |
Dividends, amount per share (in dollars per share) |  |  |  |  | $ 0.17 |  |  |  |
O2025 Q1 Dividends [Member] |  |  |  |  |  |  |  |  |
Dividends, record date | Mar. 17, 2025 |  |  |  |  |  |  |  |
Dividends, payment date | Apr. 15, 2025 |  |  |  |  |  |  |  |
Dividends, amount per share (in dollars per share) |  |  |  | $ 0.18 |  |  |  |  |
O 2025 Q2 Dividends [Member] |  |  |  |  |  |  |  |  |
Dividends, record date | Jun. 16, 2025 |  |  |  |  |  |  |  |
Dividends, payment date | Jul. 15, 2025 |  |  |  |  |  |  |  |
Dividends, amount per share (in dollars per share) |  |  | $ 0.18 |  |  |  |  |  |
O2025 Q3 Dividends [Member] |  |  |  |  |  |  |  |  |
Dividends, record date | Sep. 15, 2025 |  |  |  |  |  |  |  |
Dividends, payment date | Oct. 15, 2025 |  |  |  |  |  |  |  |
Dividends, amount per share (in dollars per share) |  | $ 0.18 |  |  |  |  |  |  |

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 + Details
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- 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 + Details
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