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Goodwill and Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2014
Goodwill [Line Items]  
Schedule of Goodwill [Table Text Block]
The change in the carrying amount of goodwill for the years ended December 31, 2014 and 2013, was as follows (in thousands):
Balance as of December 31, 2012
$
—

    Goodwill acquired
7,024

Balance as of December 31, 2013
7,024

    Goodwill acquired
15,717

    Purchase accounting adjustments
151

    Foreign currency translation adjustments
(1,329
)
Balance as of December 31, 2014
$
21,563
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Intangible assets consisted of the following as of December 31, (in thousands):
 
 
 
December 31, 2013
 
Weighted average useful life (years)
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
Developed technology
7
 
$
4,600

 
$
27

 
$
4,573

Internally developed technology
2
 
160

 
3

 
157

Customer relationships
8
 
3,500

 
37

 
3,463

Trade name
2
 
40

 
1

 
39

Total

 
$
8,300

 
$
68

 
$
8,232



 
 
 
December 31, 2014
 
Weighted average useful life (years)
 
Gross Carrying Amount
 
Accumulated Amortization*
 
Net Carrying Amount
Developed technology
7
 
$
14,567

 
$
2,082

 
$
12,485

Internally developed technology and other
2
 
1,254

 
620

 
634

Maintenance Relationship
8
 
3,591

 
788

 
2,803

Customer relationships
7
 
4,853

 
1,399

 
3,454

Trade name
8
 
952

 
133

 
819

Total
 
 
$
25,217

 
$
5,022

 
$
20,195

*Cumulative foreign currency translation adjustments, reflecting movement in the currencies of the underlying entities, decreased total intangible assets by approximately $1.5 million as of December 31, 2014.
    
Customer relationships are amortized over a period ranging from two to eight years. Trade names are amortized over a period ranging from two to eight years.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
As of December 31, 2014, the expected future amortization expense for the acquired intangible assets for each of the five succeeding years and thereafter was as follows (in thousands):
        
Year Ending December 31,
 
Amount
2015
 
$
4,429

2016
 
3,254

2017
 
3,000

2018
 
3,000

2019
 
2,873

Thereafter
 
3,639

Total amortization expense
 
$
20,195