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Goodwill and Intangible Assets (Details 2) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Sep. 30, 2014
Customer relationships
Dec. 31, 2013
Customer relationships
Sep. 30, 2014
Trade name
Dec. 31, 2013
Trade name
Sep. 30, 2014
Developed technology
Sep. 30, 2014
Contributor content
Dec. 31, 2013
Contributor content
Sep. 30, 2014
Patents
Dec. 31, 2013
Patents
Sep. 30, 2014
Domain name
Dec. 31, 2013
Domain name
Sep. 30, 2014
Digital Content
Amortizing intangible assets:                                  
Gross Carrying Amount $ 5,640   $ 5,640   $ 1,729 $ 3,400 $ 600 $ 900 $ 400 $ 600 $ 450 $ 450 $ 193 $ 193 $ 97 $ 86  
Accumulated Amortization (1,261)   (1,261)   (876) (821) (600) (198) (119) (47) (151) (127) (27) (21) (17) (9)  
Net Carrying Amount 4,379   4,379   853 2,579   702 281 553 299 323 166 172 80 77  
Weighted Average Life           6 years 4 years 9 years 14 years 7 years 15 years 15 years 17 years 17 years 14 years 15 years  
Acquisition of intangible assets                                 331
Amortization expense 167 57 384 169                          
Estimated amortization expense                                  
Remaining three months of 2014 166   166                            
2015 665   665                            
2016 665   665                            
2017 665   665                            
2018 634   634                            
Thereafter $ 1,584   $ 1,584