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Intangible Assets (Schedule of Estimated Amortization Expense for the Next Five Fiscal Years) (Details)
$ in Thousands
Jan. 31, 2020
USD ($)
Estimated amortization expense  
Remaining 2020 $ 2,785
2021 2,282
2022 2,154
2023 1,754
2024 1,679
2025 $ 1,639