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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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Dec. 31, 2012
Concentration risks          
Number of significant customers 3 2 2 3  
Aggregate dollar amount of net sales to significant customers $ 9,160,278 $ 9,444,157 $ 23,240,623 $ 25,602,046  
Revenue recognition          
Estimated contractual allowance 4,400,000   4,400,000   3,000,000
Change to reserve regarding non-contractual rebates     0    
Period for return of incorrect shipments     10 days    
Number of times overstocking returns are limited     2    
Period for return of product due to overstock     12 months    
Maximum percentage of distributor's total purchase for the prior 12-month period     1.00%    
Sales | Customer concentration risk
          
Concentration risks          
Aggregate dollar amount of net sales to significant customers $ 4,300,000 $ 3,400,000 $ 7,600,000 $ 10,600,000  
Concentration risk (as a percent) 47.40% 35.60% 32.90% 41.30%  
Product components | Supplier concentration risk
          
Concentration risks          
Concentration risk (as a percent) 75.60% 71.90% 73.10% 69.60%