Property and Equipment - Narrative (Details)		1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended	61 Months Ended
	Oct. 31, 2019 USD ($) asset	Jul. 31, 2018 USD ($)	Jan. 31, 2021 USD ($)	Jan. 31, 2020 USD ($)	Jan. 31, 2021 USD ($)	Jan. 31, 2020 USD ($)	Nov. 30, 2020 USD ($)	Nov. 30, 2019 USD ($)	Apr. 30, 2020 USD ($)	Feb. 01, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Depreciation, Depletion and Amortization			$ 279,000	$ 184,000	$ 757,000	$ 491,000
Finance lease, asset, gross			343,000		343,000				$ 343,000
Finance lease, amortization			18,000	35,000	124,000	88,000
Finance lease costs		$ 266,000					$ 231,000	$ 149,000
Future minimum lease payments remaining				2,000	173,000	51,000
Assets under finance lease			0		0					$ 0
Finance leases monthly payments		$ 11,000
Gain on disposal of equipment					0	52,000
Number of right of use assets acquired | asset	2
Traded in Assets
Property, Plant and Equipment [Line Items]
Assets under finance lease	$ 108,000
Disposal of property and equipment	$ 160,000
Gain on disposal of equipment						53,000
Finance Leased Assets
Property, Plant and Equipment [Line Items]
Finance lease, amortization			$ 18,000	$ 35,000	$ 124,000	$ 35,000
Minimum
Property, Plant and Equipment [Line Items]
Useful lives					3 years
Maximum
Property, Plant and Equipment [Line Items]
Useful lives					9 years