Acquisitions (CGC Technology Limited) (Details) - CGC - USD ($)			3 Months Ended
	Oct. 31, 2020	Jan. 27, 2020	Jan. 31, 2021
Business Acquisition [Line Items]
Aggregate purchase price	$ 23,650,000	$ 23,650,000	$ 23,650,000
Paid in cash	12,075,000	12,075,000	12,075,000
Aggregate purchase price - settled with issuance of common stock	11,575,000	$ 11,575,000	11,575,000
Aggregate purchase price - settled with issuance of common stock (in shares)		323,504
Weighted average stock price (in dollars per share)		$ 35.78
Consideration transferred, net of cash acquired		$ 23,490,000
Cash acquired	$ 160,000	$ 160,000	$ 160,000