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)

This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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