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Stock Options and Restricted Stock Units - Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Derivatives, Fair Value |  |
Total stock-based compensation | $ 1,034 | $ 962
Equity Plans |  |
Derivatives, Fair Value |  |
Direct operating costs | 84 | 63
Selling and administrative expenses | 950 | 899
Total stock-based compensation | $ 1,034 | $ 962

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