Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue from contracts with customers	$ 17,813	$ 28,552	$ 59,318	$ 87,298
Lead Fees
Revenue from contracts with customers	14,758	22,564	47,481	69,953
Click Advertising
Revenue from contracts with customers	2,432	4,948	10,102	14,463
Display and Other Advertising
Revenue from contracts with customers	622	1,020	1,720	2,815
Advertising
Revenue from contracts with customers	3,054	5,968	11,822	17,278
Other Revenues
Revenue from contracts with customers	$ 1	$ 20	$ 15	$ 67