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Inventories - Schedule of Inventory (Detail) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Inventory Disclosure [Abstract]    
Finished goods $ 4,247 $ 2,704
Raw materials   1,928
Total inventories 4,247 4,632
Short-term portion $ 4,247 3,923
Long-term portion   $ 709