Description of Business and Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Direct operating costs	$ 330	$ 381	$ 390
Selling and administrative expenses	832	945	766
Total stock-based compensation	$ 1,162	$ 1,326	$ 1,156