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Description of Business and Summary of Significant Accounting Estimates and Policies - Stock-based compensation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Description of Business and Summary of Significant Accounting Estimates and Policies |  |
Direct operating costs | $ 178 | $ 158
Selling and administrative expenses | 1,572 | 755
Total stock-based compensation | $ 1,750 | $ 913

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