Revenue from Contracts with Customers - Disaggregated revenue (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Revenue by Geographic Area
Total	$ 2,665,238	$ 2,407,124	$ 6,690,442	$ 7,790,931
United States
Revenue by Geographic Area
Total			6,446,678	6,506,854
International
Revenue by Geographic Area
Total			$ 243,764	$ 1,284,077