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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, 2023 | Mar. 31, 2022
Derivatives, Fair Value |  |
Total stock-based compensation | $ 962 | $ 537
Equity Plans |  |
Derivatives, Fair Value |  |
Direct operating costs | 63 | 52
Selling and administrative expenses | 899 | 485
Total stock-based compensation | $ 962 | $ 537

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