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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2023
Equity [Abstract] |
Summary of Stockholders' Equity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Shares of common stock
​ |  | Issued |  | Treasury | ​ | Outstanding
​ | ​ | ​ | ​ | ​ |  | ​
Balance at December 31, 2020 |  | 12,451,157 |  | — | ​ | 12,451,157
Issued |  | 4,500 |  | — | ​ | 4,500
Acquired | ​ | — | ​ | (75,000) | ​ | (75,000)
Retired | ​ | (75,000) | ​ | 75,000 | ​ | —
Balance at December 31, 2021 |  | 12,380,657 |  | — | ​ | 12,380,657
Issued |  | 5,400 |  | — | ​ | 5,400
Acquired | ​ | — | ​ | (78,900) | ​ | (78,900)
Retired | ​ | (78,900) | ​ | 78,900 | ​ | —
Balance at December 31, 2022 |  | 12,307,157 |  | — | ​ | 12,307,157
Issued |  | 6,600 |  | — | ​ | 6,600
Balance at December 31, 2023 |  | 12,313,757 |  | — | ​ | 12,313,757

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-2 + Details
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