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Acquisition (Details)
AUD in Thousands, $ in Thousands
12 Months Ended
Aug. 16, 2016
AUD
Aug. 16, 2016
USD ($)
Aug. 03, 2015
AUD
Aug. 03, 2015
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2016
AUD
Dec. 31, 2016
USD ($)
Aug. 03, 2015
USD ($)
Acquisition                
Mark-to-market | $         $ 1,263      
TVN                
Acquisition                
Initial payment     AUD 3,040 $ 2,217        
Payment due, first anniversary of closing | AUD     380          
Payment due, second anniversary of closing | AUD     380          
Additional payment made subsequent to finalization of working capital adjustments     AUD 661 $ 482        
Period following closing date during which additional payments may be required     2 years 2 years        
Maximum future contingent consideration     AUD 12,200     AUD 10,470 $ 7,651 $ 8,896
TVN | Maximum                
Acquisition                
Fair value adjustment measurement period     1 year 1 year        
TVN | Estimate of fair value                
Acquisition                
Contingent consideration     AUD 3,870         2,822
TVN | Earnout Period, Year One                
Acquisition                
Contingent consideration payments AUD 4,990 $ 3,837            
TVN | Earnout Period, Year Two | Estimate of fair value                
Acquisition                
Contingent consideration           5,350 3,863  
TVN | Contingent consideration, excluding continued employment arrangement | Estimate of fair value                
Acquisition                
Contingent consideration     AUD 1,122         $ 818
TVN | Contingent consideration, excluding continued employment arrangement | Earnout Period, Year Two | Estimate of fair value                
Acquisition                
Contingent consideration           1,529 1,103  
TVN | Contingent consideration, continued employment arrangement | Sales and marketing                
Acquisition                
Compensation-related expenses | $         $ 3,568      
TVN | Contingent consideration, continued employment arrangement | Earnout Period, Year Two | Estimate of fair value                
Acquisition                
Contingent consideration           AUD 3,821 $ 2,760