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Stock Options and Stock Appreciation Rights - SARs (Details) - Stock Appreciation Rights (SARs) - USD ($) |  | 12 Months Ended
--- | --- | ---
Apr. 18, 2022 | Dec. 31, 2023 | Dec. 31, 2022
Stock option details |  |  |
Shares available for future grants | 750,000 |  |
Maximum exercisable period for granted share-based compensation | 10 years |  |
Number of rights issued |  | 465,250 |
Vesting period | 8 years |  |
SARs |  |  |
Outstanding beginning balance |  | 489,250 |
Granted |  | 465,250 |
Forfeited |  | (24,000) |
Outstanding ending balance |  | 465,250 | 489,250
Weighted average exercise price |  |  |
Weighted average exercise price, beginning balance (per share) |  | $ 39.35 |
Weighted average exercise price, forfeited (per share) |  | 39.33 |
Weighted average exercise price, ending balance (per share) |  | $ 39.35 | $ 39.35
Aggregate intrinsic value |  |  |
Aggregate intrinsic value |  | $ 6,964,000 |
Weighted average remaining contractual term (years) |  | 8 years 6 months |
Fair Value of Liability |  | $ 1,464,000 | $ 546,000
Stock-based compensation expense |  | 918,000 | $ 546,000
Stock-based compensation cost, unrecognized |  | $ 5,090,000 |
Stock-based compensation cost, unrecognized, weighted-average period of recognition |  | 8 years 6 months |

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