Stock-Based Compensation - Schedule of Vested Stock Grants (Details) - Directors - Stock Options - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested stock grants	18,660	14,635	13,420
Stock-based compensation expense	$ 0.6	$ 0.4	$ 0.5

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details