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Acquisition of BioSuite, LLC - Additional Information (Detail) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
May 31, 2018 | Sep. 30, 2018 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |
Goodwill |  |  | $ 7.5
BioSuite LLC [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Purchase price, net of cash acquired | $ 8.6 |  |
Business combination, initial payment at closing | 5.8 |  |
Business Combination, Reduction for working capital adjustment |  | $ (0.4) |
Business combination, consideration payable | $ 3.2 |  |
Business combination, consideration payable date | Nov. 30, 2019 |  |
Goodwill | $ 7.5 |  |
Goodwill, amortizable for income tax purpose | $ 4.3 |  |
Goodwill, amortization period for income tax purpose | 15 years |  |

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