Condensed Statements of Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares |
3 Months Ended | 12 Months Ended | 162 Months Ended | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Mar. 31, 2026 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
Jun. 30, 2026 |
|
| Cash dividends declared, per share (in dollars per share) | $ 0.3 | $ 0.36 | $ 0.36 | $ 0.36 | $ 1.44 | $ 1.44 | $ 1.8 | $ 2.475 | $ 3.9 | $ 3.95 | $ 4.8 | $ 5.35 | $ 8.4 | $ 8.4 | $ 9.6 | $ 10.8 | $ 6.975 | $ 70.09 |