Revenue from Contracts with Customers - Disaggregated revenue (Details) - USD ($)	3 Months Ended		6 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Revenue by Geographic Area
Total	$ 2,014,943	$ 2,914,551	$ 4,025,204	$ 5,383,807
United States
Revenue by Geographic Area
Total			3,807,552
International
Revenue by Geographic Area
Total			$ 217,652