Business Combinations (Details) - USD ($)			12 Months Ended			13 Months Ended
	Oct. 01, 2018	Jul. 02, 2018	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2019
Business Acquisition [Line Items]
Acquisition-related costs			$ 3,370,000	$ 5,111,000	$ 0
Contingent consideration			4,372,000	0		$ 4,372,000
DonRiver
Business Acquisition [Line Items]
Acquisition-related costs			2,400,000	3,500,000
Undiscounted contingent consideration, maximum	$ 28,500,000
Contingent consideration agreement term	3 years
Contingent consideration revenue measurement term	25 months
Change in contingent consideration						(2,800,000)
Contingent consideration	$ 10,900,000		8,100,000			8,100,000
Short term contingent consideration			4,400,000			$ 4,400,000
Acquisition of business, net of cash acquired	$ 43,283,000
DonRiver | Customer relationships and contracts
Business Acquisition [Line Items]
Intangible assets, useful life	7 years
DonRiver | Developed technology
Business Acquisition [Line Items]
Intangible assets, useful life	7 years
Packet Design
Business Acquisition [Line Items]
Acquisition-related costs				1,600,000
Acquisition of business, net of cash acquired		$ 41,100,000
Packet Design | Customer relationships and contracts
Business Acquisition [Line Items]
Intangible assets, useful life		3 years
Packet Design | Developed technology
Business Acquisition [Line Items]
Intangible assets, useful life		5 years
Contingent Consideration | DonRiver
Business Acquisition [Line Items]
Undiscounted contingent consideration, maximum	$ 15,000,000.0
Undiscounted contingent consideration, minimum	0.0
Contingent Compensation | DonRiver
Business Acquisition [Line Items]
Undiscounted contingent consideration, maximum	13,500,000
Undiscounted contingent consideration, minimum	$ 0.0
Change in contingent consideration			$ (5,100,000)	$ (400,000)