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Revenue Recognition (Tables)
6 Months Ended
Jun. 30, 2019
Revenue Recognition [Abstract]  
Revenue from contracts
   

Three Months Ended

June 30,

   

Six Months Ended

June 30,

 
    2019     2018     2019     2018  
                         
Lead fees   $ 21,691     $ 22,211     $ 47,389     $ 46,291  
Advertising                                
Clicks     4,456       5,771       9,515       12,462  
Display and other advertising     976       1,179       1,795       2,575  
      5,432       6,950       11,310       15,037  
                                 
Other revenues     19       131       47       313  
   Total revenues   $ 27,142     $ 29,292     $ 58,746     $ 61,641