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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2016
Loss Contingency [Abstract]  
Schedule of future minimum payments under non-cancellable operating leases
Future minimum payments under non-cancellable operating leases are as follows at December 31, 2016 (in thousands): 
 
Lease Payments
Years ending December 31,
 
2017
$
3,077

2018
3,185

2019
3,280

2020
712

2021
490

Thereafter
41

Total minimum payments (1)
$
10,785


(1)
Minimum payments have not been reduced by future minimum sublease rentals of $1.8 million to be received under non-cancellable subleases.