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Stock Compensation Plans - Stock Purchase Plan (Details) - Stock Purchase Plan - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Stock purchase plan |  |
Purchase price of shares in terms compared to market price per share (as a percent) | 90.00% |
Annual purchase limitation per employee (in dollars per employee) | $ 22,500 |
Compensation expense | $ 0 |
Common stock, shares authorized (in shares) | 2,000,000 |
Shares sold to employees (in shares) | 65,971 | 48,990
Value of shares sold to employees under purchase plan | $ 3,000,000 | $ 3,000,000
Shares available (in shares) | 151,814 |

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- Definition The maximum value of common stock an employee can purchase under the plan per period. + References No definition available. + Details
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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