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Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Property, Plant and Equipment [Line Items] |  |  |  |
Depreciation and amortization expenses |  | $ 11.0 | $ 8.8 | $ 12.6
Costs related to terminated manufacturing obligations | $ 0.9 |  |  |
Manufacturing Equipment |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Original cost of impaired equipment | 23.4 |  |  | 23.4
Net book value of impaired equipment | $ 15.1 |  |  | $ 15.1

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