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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
As of December 31, 2014, future minimum lease payments under noncancelable operating leases are as follows:
 
Duration
 
Amount
 
 
 
(in thousands)
 
 
 
 
 
January 1, 2015~December 31, 2015
 
$
1,941
 
January 1, 2016~December 31, 2016
 
 
1,330
 
January 1, 2017~December 31, 2017
 
 
860
 
January 1, 2018~December 31, 2018
 
 
288
 
January 1, 2019~December 31, 2019
 
 
244
 
January 1, 2020~December 31, 2024
 
 
745
 
 
 
$
5,408