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Segment Disclosure (Details Textual)
$ in Millions
9 Months Ended
Sep. 30, 2015
USD ($)
segment
geographic_area
Dec. 31, 2014
USD ($)
Segment Reporting [Abstract]    
Number of reportable segments 1  
Number of geographic areas | geographic_area 3  
Long-lived assets US | $ $ 6.3 $ 15.6