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Business Combination - IMX - Schedule of Pro Forma Results of Operations (Detail) - ImmuMetrix, Inc. [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Revenue: |  |
Net revenue | $ 27,306 | $ 22,098
Net loss | $ (1,080) | $ (3,768)

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