Share-Based Payments - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Jul. 31, 2022	Jan. 31, 2023	Apr. 30, 2022
Total
Outstanding, beginning balance (in shares)	1,658,239	1,658,239
Granted (in shares)		184,720
Exercised (in shares)		(36,209)
Forfeited (in shares)		(9,125)
Canceled (in shares)		(13,874)
Expired (in shares)		(4,584)
Outstanding, ending balance (in shares)		1,779,167
Vested and expected to vest (in shares)		1,779,167
Exercisable (in shares)		1,390,877
Weighted Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 4.51	$ 4.51
Granted (in dollars per share)		7.25
Exercised (in dollars per share)		3.21
Forfeited (in dollars per share)		7.94
Canceled (in dollars per share)		3.93
Expired (in dollars per share)		5.40
Outstanding, ending balance (in dollars per share)		4.81
Vested and expected to vest (in dollars per share)		4.81
Exercisable (in dollars per share)		$ 4.24
Weighted Average Remaining Contractual Life (Years)
Outstanding (in years)	4 years 10 months 24 days	4 years 9 months 18 days
Outstanding, granted (in years)		9 years 7 months 6 days
Vested and expected to vest (in years)		4 years 9 months 18 days
Exercisable (in years)		3 years 10 months 24 days
Aggregate Intrinsic Value
Outstanding		$ 1,896	$ 6,131
Vested and expected to vest		1,896
Exercisable		$ 1,896
Directors and Employees
Total
Outstanding, beginning balance (in shares)	1,617,324	1,617,324
Granted (in shares)		184,720
Exercised (in shares)		(36,209)
Forfeited (in shares)		(9,125)
Canceled (in shares)		(13,874)
Expired (in shares)		0
Outstanding, ending balance (in shares)		1,742,836
Vested and expected to vest (in shares)		1,742,836
Exercisable (in shares)		1,389,002
Non- Employees
Total
Outstanding, beginning balance (in shares)	40,915	40,915
Granted (in shares)		0
Exercised (in shares)		0
Forfeited (in shares)		0
Canceled (in shares)		0
Expired (in shares)		(4,584)
Outstanding, ending balance (in shares)		36,331
Vested and expected to vest (in shares)		36,331
Exercisable (in shares)		1,875