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Inventories
3 Months Ended
Mar. 31, 2012
Inventory Disclosure [Abstract]  
Inventories

(2)    Inventories at March 31, 2012 and December 31, 2011 consisted of the following:

                                                                                                                   March 31,                           December 31,

                                                                                                                           2012                                     2011    

                            Finished goods                                                              $   1,926                               $  2,518

                            Work-in-process                                                                 1,152                                      795

                            Raw materials                                                                       1,757                                   1,692

                            Total                                                                                  $  4,835                               $  5,005