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Inventories (Annual and Quarter) (Detail) - Inventories Table (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Dec. 31, 2010
Raw materials $ 1,834 $ 1,826 $ 3,948
Work-in-progress 515 449 152
Finished goods 560 600 752
Total Inventories $ 2,909 $ 2,875 $ 4,852