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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Equipment and machinery Machinery and Equipment, Gross Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Total stockholders’ equity Beginning balance Ending balance Stockholders' Equity Attributable to Parent Amortization expense Amortization of Intangible Assets Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Other liabilities Increase (Decrease) in Other Operating Liabilities SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: Supplemental Cash Flow Elements [Abstract] Canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Deferred revenue, net Contract with Customer, Liability, Current Schedule of Unrealized Loss on Investments Schedule of Unrealized Loss on Investments [Table Text Block] Accretion of discount on available-for-sale securities, net Accretion (Amortization) of Discounts and Premiums, Investments Convertible Debt Convertible Debt [Member] Acquired technology Technology-Based Intangible Assets [Member] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Components of Lease Cost Lease, Cost [Table Text Block] Unbilled accounts receivable, net Contract with Customer, Asset, Net, Current Total EMEA EMEA EMEA [Member] Tax Period [Domain] Tax Period [Domain] Cost Finite-Lived Intangible Assets, Gross Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Allowance for doubtful accounts and revenue reserves Allowance, July 31, 2019 Allowance, April 30, 2020 Accounts Receivable, Allowance 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Income Statement [Abstract] Income Statement [Abstract]