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Percentage of Revenue from Significant Customers (Detail) - Customer Concentration Risk - Sales Revenue | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
GE Healthcare |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from significant customers as a percentage of total revenue | 23.00% | 26.00% | 29.00% | 38.00%
MilliporeSigma |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from significant customers as a percentage of total revenue | 28.00% | 38.00% | 30.00% | 32.00%

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