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Summary of Significant Accounting Policies - Schedule of Disaggregation of Revenue (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2019 | Jul. 31, 2018 | Jul. 31, 2019 | Jul. 31, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue percentage by product group | 100.00% | 100.00% | 100.00% | 100.00%
EDA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue percentage by product group | 57.00% | 64.00% | 59.00% | 63.00%
IP & System Integration |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue percentage by product group | 33.00% | 27.00% | 31.00% | 28.00%
Software Integrity Products & Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue percentage by product group | 10.00% | 9.00% | 10.00% | 9.00%
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue percentage by product group | 0.00% | 0.00% | 0.00% | 0.00%

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