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Stock Options - Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Stock Options
Direct operating costs	$ 40	$ 34	$ 119	$ 72
Selling and administrative expenses	192	317	581	552
Total stock-based compensation	$ 232	$ 351	$ 700	$ 624

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Amount of selling, general and administrative expense classified as other.

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Amount of noncash expense for share-based payment arrangement.

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Amount of noncash expense for option under share-based payment arrangement.

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