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Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Inventory [Line Items]    
Raw materials      
Work in process 1,177 3,170
Finished goods 925 234
Total 2,102 3,404
Less current portion (925) (419)
Non-current portion included in other assets, net 1,177 2,985
Total $ 2,102 $ 3,404