Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues
Total revenue	$ 37,577	$ 32,409
Subscriber revenue
Revenues
Total revenue	$ 19,949	19,833
Subscriber revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-03-31
Revenues
Revenue, remaining performance obligation, expected timing of satisfaction, period	60 days
Advertising revenue
Revenues
Total revenue	$ 15,906	11,816
Advertising revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-03-31
Revenues
Revenue, remaining performance obligation, expected timing of satisfaction, period	30 days
Other revenue
Revenues
Total revenue	$ 1,722	$ 760