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Purchase Price at the Date of Acquisition (Detail) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended
--- | --- | ---
Jun. 30, 2017 | Mar. 31, 2018
Business Acquisition [Line Items] |  |
Working capital adjustment |  | $ 200
Integrated Photonics, Inc |  |
Business Acquisition [Line Items] |  |
Net cash paid at acquisition | $ 40,098 |
Working capital adjustment | 848 |
Fair value of cash earnout arrangement | 2,215 |
Purchase price | $ 43,161 |

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