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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]  
Summary of Future Minimum Rental Commitments under Non-Cancelable Operating Leases

The Company leases certain of its office and manufacturing space. The future minimum rental commitments under non-cancelable operating leases with remaining terms in excess of one year are as follows (in thousands):

 

Year

      

2018

   $ 1,742

2019

     1,152

2020

     872

2021

     467

2022 and thereafter

     1,002