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Basis and Summary of Significant Accounting Policies - Changes in Accumulated Other Comprehensive Loss by Component (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Accumulated Other Comprehensive Income [Roll Forward]        
Beginning Balance     $ (90)  
Other comprehensive income $ (156) $ (26) (132) $ (19)
Ending Balance (222)   (222)  
Foreign Currency        
Accumulated Other Comprehensive Income [Roll Forward]        
Beginning Balance     (90)  
Other comprehensive income     (132)  
Ending Balance $ (222)   $ (222)