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Segment Disclosure (Details Textual)
$ in Millions
6 Months Ended
Jun. 30, 2015
USD ($)
segment
geographic_area
Dec. 31, 2014
USD ($)
Segment Reporting [Abstract]    
Number of Reportable Segments | segment 1  
Number of geographic areas | geographic_area 3  
Long-lived assets US $ 5.9 $ 15.6