Property and Equipment - Narrative (Details) - USD ($)	1 Months Ended	3 Months Ended			6 Months Ended		12 Months Ended	61 Months Ended
	Jul. 31, 2018	Oct. 31, 2020	Jan. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019	Nov. 30, 2020	Nov. 30, 2019	Apr. 30, 2020	Jul. 31, 2019
Property, Plant and Equipment [Line Items]
Depreciation		$ 254,000		$ 162,000	$ 478,000	$ 307,000
Assets under finance lease		343,000			343,000				$ 366,000
Finance lease costs	$ 266,000							$ 149,000
Future minimum lease payments remaining			$ 2,000		115,000	14,000
Finance leases monthly payments	$ 11,000
Finance lease, liability										$ 0
Finance lease, amortization		53,100		0	106,000	0
Subsequent Event
Property, Plant and Equipment [Line Items]
Finance lease costs							$ 231,000
Future minimum lease payments remaining							19,000
Finance leases monthly payments							$ 19,000
Present value of minimum future obligations interest rate							4.75%
Finance Leased Assets
Property, Plant and Equipment [Line Items]
Depreciation		$ 53,000		$ 16,000	$ 106,000	$ 53,000
Minimum
Property, Plant and Equipment [Line Items]
Useful lives					3 years
Maximum
Property, Plant and Equipment [Line Items]
Useful lives					9 years