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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
	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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