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Acquisitions - Schedule of Consolidated Net Revenue and Earnings (Detail) - Electro Scientific Industries Inc [Member] - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2019
Acquisition Date [Line Items] |  |
Total net revenues | $ | $ 55,877 | $ 91,096
Net loss | $ | $ (3,129) | $ (34,844)
Net loss per share: |  |
Basic | $ / shares | $ (0.06) | $ (0.64)
Diluted | $ / shares | $ (0.06) | $ (0.63)

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