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4. Property, Plant and Equipment, net (Tables)
12 Months Ended
Dec. 31, 2012
Property Plant And Equipment Net Tables  
Schedule of Property, Plant, and Equipment
    December 31,  
    2012     2011  
             
Leasehold improvements   $ 294     $ 274  
Machinery and equipment     5,289       4,934  
Less accumulated depreciation and amortization     (4,470 )     (4,050 )
Property, plant and equipment, net   $ 1,113     $ 1,158