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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2015
Commitments and Contingencies  
Schedule of future minimum lease payments under non-cancelable operating leases and purchase commitments

        Future minimum lease payments under non-cancelable operating leases and purchase commitments are (in thousands):

                                                                                                                                                                                    

Year ended December 31,

 

Operating
leases

 

Purchase
commitments

 

Total

 

2016

 

$

796 

 

$

1,305 

 

$

2,101 

 

2017

 

 

754 

 

 

408 

 

 

1,162 

 

2018

 

 

734 

 

 

378 

 

 

1,112 

 

2019

 

 

756 

 

 

 

 

756 

 

2020

 

 

513 

 

 

 

 

513 

 

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Total minimum payments

 

$

3,553 

 

$

2,091 

 

$

5,644 

 

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