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Summary of Significant Accounting Policies (Detail textuals)
12 Months Ended
Dec. 31, 2014
Segment
Country
Property, Plant and Equipment [Line Items]  
Number of operating segments 1us-gaap_NumberOfOperatingSegments
Number of geographic areas for development operations 2us-gaap_NumberOfCountriesInWhichEntityOperates
Property, plant and equipment | Minimum  
Property, Plant and Equipment [Line Items]  
Estimated useful life 3 years
Property, plant and equipment | Maximum  
Property, Plant and Equipment [Line Items]  
Estimated useful life 5 years
Leasehold improvements | Minimum  
Property, Plant and Equipment [Line Items]  
Estimated useful life 5 years
Leasehold improvements | Maximum  
Property, Plant and Equipment [Line Items]  
Estimated useful life 15 years