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Etratech Acquisition - Summary of Amortization Expense for Prospective Years (Detail) - Etratech Inc.
$ in Thousands
Mar. 31, 2018
USD ($)
Business Acquisition [Line Items]  
April 1, 2018 through December 31, 2018 $ 2,821
2019 3,761
2020 3,761
2021 3,669
2022 3,272
2023 $ 2,596