Share-Based Payments - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Jul. 31, 2023	Apr. 30, 2023
Total
Outstanding, beginning balance (in shares)	1,775,667
Granted (in shares)	68,600
Exercised (in shares)	(40,897)
Forfeited (in shares)	(2,000)
Canceled (in shares)	(34,618)
Expired (in shares)	0
Outstanding, ending balance (in shares)	1,766,752	1,775,667
Vested and expected to vest (in shares)	1,766,752
Exercisable (in shares)	1,493,659
Weighted Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 4.80
Granted (in dollars per share)	6.11
Exercised (in dollars per share)	2.90
Forfeited (in dollars per share)	4.18
Canceled (in dollars per share)	3.98
Outstanding, ending balance (in dollars per share)	4.91	$ 4.80
Vested and expected to vest (in dollars per share)	4.91
Exercisable (in dollars per share)	$ 4.62
Weighted Average Remaining Contractual Life (Years)
Outstanding (in years)	4 years 7 months 6 days	4 years 7 months 6 days
Outstanding, granted (in years)	9 years 10 months 24 days
Vested and expected to vest (in years)	4 years 7 months 6 days
Exercisable (in years)	4 years
Aggregate Intrinsic Value
Outstanding	$ 4,254	$ 2,683
Vested and expected to vest	4,254
Exercisable	$ 4,103
Directors and Employees
Total
Outstanding, beginning balance (in shares)	1,739,336
Granted (in shares)	68,600
Exercised (in shares)	(40,897)
Forfeited (in shares)	(2,000)
Canceled (in shares)	(34,618)
Expired (in shares)	0
Outstanding, ending balance (in shares)	1,730,421	1,739,336
Vested and expected to vest (in shares)	1,730,421
Exercisable (in shares)	1,491,784
Non- Employees
Total
Outstanding, beginning balance (in shares)	36,331
Granted (in shares)	0
Exercised (in shares)	0
Forfeited (in shares)	0
Canceled (in shares)	0
Expired (in shares)	0
Outstanding, ending balance (in shares)	36,331	36,331
Vested and expected to vest (in shares)	36,331
Exercisable (in shares)	1,875