Property and Equipment - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021	Nov. 30, 2020	Apr. 30, 2021	Jul. 31, 2020
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 396	$ 279	$ 1,100	$ 757
Finance lease, asset, gross	343		343			$ 343
Finance lease, depreciation and amortization	0	18	0	124
Total property and equipment	11,999		11,999			10,046
Servicing asset	1,400		1,400
Servicing asset at gross capitalized amount	1,900		1,900
Hosting arrangement, amortization expense	79	40	160	93
Finance lease costs					$ 231
Finance lease, amortization	0	$ 53	0	$ 106
Assets under finance lease	0		$ 0
Capitalized software development costs
Property, Plant and Equipment [Line Items]
Useful lives			3 years
Total property and equipment	$ 1,888		$ 1,888			$ 484	$ 484
Minimum
Property, Plant and Equipment [Line Items]
Useful lives			3 years
Maximum
Property, Plant and Equipment [Line Items]
Useful lives			9 years