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BALANCE SHEET COMPONENTS - Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Apr. 30, 2020
Jan. 31, 2020
Jul. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Prepaid operating expenses $ 32,355   $ 37,864
VAT receivables 8,181   5,068
Tenant improvement allowance receivables 8,056   0
Prepaid income taxes 1,477   19,690
Other current assets 13,120   12,043
Total prepaid expenses and other current assets $ 63,189   $ 74,665
Income taxes receivable   $ 18,000