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Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Inventory [Line Items]    
Raw materials $ 1,331  
Work in process 1,415  
Finished goods 437 6
Total 3,183 6
Current portion 716 6
Non-current portion included in Other assets, net $ 2,467