Property and Equipment - Narrative (Details) $ in Thousands		1 Months Ended	3 Months Ended		12 Months Ended	61 Months Ended
	Oct. 31, 2019 USD ($)	Jul. 31, 2018 USD ($)	Jul. 31, 2021 USD ($)	Jul. 31, 2020 USD ($)	Nov. 30, 2020 USD ($)	Nov. 30, 2019 USD ($)	Apr. 30, 2021 USD ($)	Apr. 30, 2020 asset
Property, Plant and Equipment [Line Items]
Depreciation and amortization			$ 317	$ 224
Finance lease, asset, gross			343				$ 343
Finance lease, depreciation and amortization			0	53
Total property and equipment			11,030				10,046
Hosting arrangement, amortization expense			40	0
Hosting arrangement, capitalized enhancements			1,200				991
Finance lease costs		$ 266			$ 231	$ 149
Future minimum lease payments remaining			0	58
Assets under finance lease			0
(Gain) on disposal of equipment			4	0
Number of right of use assets acquired | asset								2
Finance lease, amortization			$ 53	0
Capitalized software development costs
Property, Plant and Equipment [Line Items]
Useful lives			3 years
Total property and equipment			$ 484				$ 484
Traded in Assets
Property, Plant and Equipment [Line Items]
Assets under finance lease	$ 108
Disposal of property and equipment	$ 160
(Gain) on disposal of equipment				$ 53
Minimum
Property, Plant and Equipment [Line Items]
Useful lives			3 years
Maximum
Property, Plant and Equipment [Line Items]
Useful lives			9 years