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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]  
Future Minimum Lease Commitments under Operating and Capital Leases

Future minimum lease commitments under these operating and capital leases at December 31, 2016, are as follows (in thousands):

 

Years ending December 31,

 

Capital Leases

 

 

Operating leases

 

2017

 

$

74

 

 

$

2,133

 

2018

 

 

24

 

 

 

2,092

 

2019

 

 

5

 

 

 

2,082

 

2020

 

 

—

 

 

 

2,041

 

2021 and thereafter

 

 

—

 

 

 

1

 

Total minimum lease payments

 

$

103

 

 

$

8,349

 

Less: amounts representing interest

 

 

(9

)

 

 

 

 

Present value of minimum lease payments

 

 

94

 

 

 

 

 

Less: current portion of obligations under capital

   leases

 

 

(68

)

 

 

 

 

Long-term portion of obligations under capital

   leases

 

$

26