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OTHER EXPENSES, NET (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Royalty income $ (15,166) $ (11,190) $ (3,385)
Interest income (17,202) (15,499) (25,185)
Interest expense 75,274 81,397 21,610
Debt issuance amortization 2,876 5,240 2,593
Other losses (gains) 7,067 4,007 (2,502)
Other expenses, net $ 52,849 $ 63,955 $ (6,869)