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Debt - Schedule of Maturities of Long-Term Debt (Details) - USD ($)
$ in Thousands
Jul. 31, 2019
Jul. 31, 2018
Debt Disclosure [Abstract]    
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months $ 50,166  
Long-term debt $ 50,166 $ 0