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6. Intangible Assets (Details) - Finite-lived Intangible Assets Amortization Expense
$ in Thousands
Apr. 30, 2017
USD ($)
Finite-lived Intangible Assets Amortization Expense [Abstract]  
Remainder of 2018 $ 1,000
2019 1,334
2020 1,334
2021 1,334
2022 1,334
Thereafter 6,596
$ 12,932