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Segment Information, Geographic Data, and Significant Customers (Detail) - Long-lived assets by geographic areas (USD $)
Dec. 31, 2012
Dec. 31, 2011
Total long-lived assets $ 874,062 $ 1,714,090
United States [Member]
   
Total long-lived assets 690,454 1,387,283
Malaysia [Member]
   
Total long-lived assets $ 183,608 $ 326,807