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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2004
Dec. 31, 2002
Dec. 31, 2016
Loss Contingencies            
Charge in general and administrative expenses $ 0 $ 0 $ 1      
Operating Leases, Future Minimum Payments Receivable [Abstract]            
2017 Remaining 2,964 2,964        
2018 4,932 4,932        
2019 4,274 4,274        
2020 3,795 3,795        
2021 3,187 3,187        
Thereafter 5,612 5,612        
Total 24,764 24,764        
Purchase Obligation, Fiscal Year Maturity [Abstract]            
2017 Remaining 388 388        
2018 536 536        
2019        
2020 0 0        
2021 0 0        
Thereafter 0 0        
Total 924 924        
Contractual Obligation, Fiscal Year Maturity [Abstract]            
2017 Remaining 3,352 3,352        
Total Commitments, Due in 2018 5,468 5,468        
Total Commitments, Due in 2019 4,274 4,274        
Total Commitments, Due in 2020 3,795 3,795        
Total Commitments, Due in 2021 3,187 3,187        
Total Commitments, Due Thereafter 5,612 5,612        
Total commitments 25,688 25,688        
Local deals and getaway merchant payables $ 9,800 $ 9,800       $ 14,800
Travel Zoo Com Corporation            
Loss Contingencies            
Period for receiving shares under merger (in years)       2 years 2 years  
Number of shares exchanged under merger (in shares)         1