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OTHER (EXPENSES) REVENUES, NET (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Royalty income $ 0 $ 4,525 $ (3,000) $ 8,570
Interest income 3,628 4,375 6,518 9,380
Interest expense (16,879) (18,979) (34,101) (38,465)
Other (2) (285) 61,359 (358)
Total, net $ (13,253) $ (10,364) $ 30,776 $ (20,873)