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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2013
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Jun. 30, 2012
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Jun. 30, 2013
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Jun. 30, 2012
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Dec. 31, 2012
Concentration risks          
Number of significant customers 2 3 2 2  
Aggregate dollar amount of net sales to significant customers $ 6,907,233 $ 8,727,905 $ 14,080,345 $ 16,157,889  
Revenue recognition          
Estimated contractual allowance 2,900,000   2,900,000   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 $ 3,000,000 $ 3,900,000 $ 4,700,000 $ 4,900,000  
Concentration risk (as a percent) 44.50% 45.20% 33.80% 30.00%  
Product components | Supplier concentration risk
          
Concentration risks          
Concentration risk (as a percent) 72.30% 69.60% 71.70% 67.60%