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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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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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+ References

No definition available.

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