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Amortization Expense of Intangible Assets (Detail) - CaseStack, Inc. [Member]
$ in Thousands
Sep. 30, 2019
USD ($)
Finite Lived Intangible Assets [Line Items]  
Remainder 2019 $ 2,292
2020 8,661
2021 8,300
2022 8,300
2023 $ 8,155