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Commitments and Contingencies (Tables)
3 Months Ended
Mar. 31, 2018
Commitments And Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Lease Payments under All Non-cancelable Operating Leases

Future minimum lease payments under all non-cancelable operating leases as of March 31, 2018, were as follows (in thousands):

 

 

 

Minimum Lease Payments

 

2018

 

$

310

 

2019

 

 

488

 

2020

 

 

499

 

2021

 

 

510

 

2022

 

 

522

 

2023

 

 

177

 

Total future minimum lease payments

 

$

2,506