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Acquisitions (Details)
3 Months Ended 9 Months Ended 17 Months Ended 0 Months Ended 9 Months Ended 0 Months Ended
Sep. 30, 2014
USD ($)
Sep. 30, 2014
USD ($)
Sep. 30, 2014
USD ($)
Sep. 30, 2014
USD ($)
Jul. 02, 2014
USD ($)
Dec. 31, 2013
USD ($)
Jul. 02, 2014
Videotel [Member]
Jul. 01, 2014
Videotel [Member]
Sep. 30, 2014
Videotel [Member]
USD ($)
Sep. 30, 2013
Videotel [Member]
USD ($)
Jul. 02, 2014
Videotel [Member]
USD ($)
May 11, 2013
Headland Media Limited [Member]
USD ($)
May 11, 2013
Headland Media Limited [Member]
GBP (£)
Jul. 31, 2013
Headland Media Limited [Member]
Post closing adjustment
USD ($)
Jul. 02, 2014
Customer Relationships [Member]
Videotel [Member]
USD ($)
Jul. 02, 2014
Off-Market Favorable Lease [Member]
Videotel [Member]
USD ($)
Jul. 02, 2014
Distribution rights
Videotel [Member]
USD ($)
Jul. 02, 2014
Computer Software, Intangible Asset [Member]
Videotel [Member]
USD ($)
Business Acquisition [Line Items]                                    
Liability for Uncertain Tax Positions, Noncurrent $ 3,616,000 $ 3,616,000 $ 3,616,000 $ 3,616,000   $ 0     $ 4,000                  
Business Combination, Contingent Consideration, Liability                     49,162,000 24,169,000 15,576,000 169,000        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets                     3,467,000              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net                     4,428,000              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue                     961,000              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles                     25,524,000       12,759,000 791,000 9,814,000 2,160,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent                     (4,813,000)              
Foreign currency exchange rate, translation                       1.5517            
Business combination, consideration transferred, percentage held in escrow               10.00%       10.00% 10.00%          
Business combination, consideration transferred, period escrow held             21 months         18 months 18 months          
Business Combination, Indemnification Assets, Amount as of Acquisition Date         6,600,000                          
Service revenue since acquisition 4,758,000   10,977,000 19,777,000                            
Business Combination, Pro Forma Information [Abstract]                                    
Pro forma net revenues                 133,452,000 139,074,000                
Pro forma net income                 436,000 7,015,000                
Basic pro forma net income per share                 $ 0.03 $ 0.46                
Diluted pro forma net income per share                 $ 0.03 $ 0.46                
Goodwill, Acquired During Period                 24,023,000                  
Business Combination, Confidentiality, Non-competition and Non-solicitation Covenants, Period             18 months                      
Business Acquisition, Transaction Costs   $ 5,000 $ 468,000