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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2013 item | Jun. 30, 2012 item | Jun. 30, 2013 item | Jun. 30, 2012 item | 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% |

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