Property and Equipment - Narrative (Details) - USD ($)	1 Months Ended		3 Months Ended			61 Months Ended
	Dec. 31, 2019	Jul. 31, 2018	Jul. 31, 2020	Jan. 31, 2020	Jul. 31, 2019	Nov. 30, 2019	Apr. 30, 2020
Property, Plant and Equipment [Line Items]
Depreciation			$ 224,000		$ 145,000
Assets under finance lease			343,000				$ 366,000
Finance lease costs	$ 231,000	$ 266,000				$ 149,000
Future minimum lease payments remaining	77,000		58,000	$ 2,000	7,000
Finance leases monthly payments	$ 19,000	$ 11,000
Finance lease, liability					0
Present value of minimum future obligations interest rate	4.75%
Finance lease, amortization			53,100
Finance Leased Assets
Property, Plant and Equipment [Line Items]
Depreciation			$ 53,000		$ 37,000
Minimum
Property, Plant and Equipment [Line Items]
Useful lives			3 years
Maximum
Property, Plant and Equipment [Line Items]
Useful lives			9 years