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Commitments and Contingencies (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Jul. 21, 2017
USD ($)
Jul. 06, 2017
USD ($)
Apr. 30, 2017
Jul. 31, 2015
USD ($)
Dec. 31, 2017
USD ($)
Lease
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Commitments and Contingencies Disclosure [Abstract]              
Number of leases | Lease         5    
Future sublease payments to be received   $ 2,400     $ 100    
Lessee leasing arrangements, term of operating leases   30 months 72 months        
Lease incentives $ (7,500)     $ (5,100)      
Deferred rent liability         12,300 $ 6,200  
Rent expense         3,100 $ 3,000 $ 900
Future minimum rental payments required under all non-cancelable operating leases [Abstract]              
2018         6,574    
2019         6,342    
2020         4,775    
2021         4,743    
2022         4,885    
Thereafter         18,484    
Total         $ 45,803