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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $)
 12 Months Ended
Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Concentration risks      
Number of significant customers 3 4 3
Concentration risk amount $ 33,644,503 $ 32,102,296 $ 36,219,562
Increase in allowance for doubtful accounts 107,246 1,298,044 133,990
Revenue recognition      
Estimated contractual allowance 3,036,564 2,170,764  
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%    
Customer concentration risk
      
Concentration risks      
Increase in allowance for doubtful accounts 107,000    
Sales | Customer concentration risk
      
Concentration risks      
Concentration risk amount $ 13,700,000 $ 16,200,000 $ 13,900,000
Concentration risk (as a percent) 40.60% 50.60% 38.60%
Product components | Supplier concentration risk
      
Concentration risks      
Concentration risk (as a percent) 72.00% 67.10% 64.10%