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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Inventory (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Dec. 31, 2015
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Laboratory service revenue | $ 14,835 | $ 4,266 |
Gross Profit | 5,776 | 54 |
Inventory |  |  |
Raw materials | 2,066 | 2,305 |
Semi-finished and finished goods | 6,091 | 3,118 |
Total inventory | $ 8,157 | $ 5,423 | $ 6,677

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