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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]  
Summary of Future Minimum Rental Commitments under Non-Cancelable Operating Leases
The Company leases certain of its offices, manufacturing space, and several automobiles. The future minimum rental commitments under 
non-
cancelable 
operating leases with remaining terms in excess of one year are as follows (in thousands):
 
Year
 
 
 
2019
 
$
1,962
 
2020
 
 
1,502
 
2021
 
 
688
 
2022
 
 
447
 
2023 and thereafter
 
 
830