Stock-based Payments - Schedule of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Beginning Balance (in shares)	1,919,497	1,775,667
Granted (in shares)	330,955	444,730
Exercised (in shares)	(183,404)	(155,449)
Canceled (in shares)	(83,325)	(50,535)
Forfeited (in shares)	(268,375)	(40,750)
Expired (in shares)	(36,666)	(54,166)
Outstanding, Ending Balance (in shares)	1,678,682	1,919,497	1,775,667
Vested and expected to vest (in shares)	1,678,682	1,919,497
Exercisable (in shares)	1,466,692	1,484,895
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price, Outstanding, Beginning Balance (in usd per share)	$ 5.04	$ 4.8
Weighted Average Exercise Price, Granted (in usd per share)	5.01	6.08
Weighted Average Exercise Price, Exercised (in usd per share)	3.64	2.31
Weighted Average Exercise Price, Canceled (in usd per share)	5.83	4.82
Weighted Average Exercise Price, Forfeited (in usd per share)	6.05	6.21
Weighted Average Exercise Price, Expired (in usd per share)	5.43	12.78
Weighted Average Exercise Price, Outstanding, Ending Balance (in usd per share)	4.98	5.04	$ 4.8
Weighted Average Exercise Price, Vested and Expected to Vest (in usd per share)	4.98	5.04
Weighted Average Exercise Price, Exercisable (in usd per share)	$ 4.86	$ 4.65
Weighted Average Remaining Contractual Term, Outstanding, Beginning Balance (in years)		5 years 2 months 12 days	4 years 7 months 6 days
Weighted Average Remaining Contractual Life, Granted	9 years 7 months 6 days	9 years 6 months
Weighted Average Remaining Contractual Term, Outstanding, Ending Balance (in years)	4 years 10 months 24 days	5 years 2 months 12 days
Weighted Average Remaining Contractual Life (Years), Vested and expected to vest	4 years 10 months 24 days	5 years 2 months 12 days
Weighted Average Remaining Contractual Life (Years), Exercisable	4 years 3 months 18 days	4 years 2 months 12 days
Aggregate Intrinsic Value, Outstanding, Beginning Balance	$ 2,172	$ 2,683
Aggregate Intrinsic Value, Granted	0	0
Aggregate Intrinsic Value, Outstanding, Ending Balance	4,434	2,172	$ 2,683
Aggregate Intrinsic Value, Vested and expected to vest	4,434	2,172
Aggregate Intrinsic Value, Exercisable	$ 4,096	$ 2,172
Directors and Employees
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Beginning Balance (in shares)	1,883,166	1,739,336
Granted (in shares)	330,955	444,730
Exercised (in shares)	(183,404)	(155,449)
Canceled (in shares)	(83,325)	(50,535)
Forfeited (in shares)	(268,375)	(40,750)
Expired (in shares)	(36,666)	(54,166)
Outstanding, Ending Balance (in shares)	1,642,351	1,883,166	1,739,336
Vested and expected to vest (in shares)	1,642,351	1,883,166
Exercisable (in shares)	1,461,067	1,481,145
Non- Employees
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Beginning Balance (in shares)	36,331	36,331
Granted (in shares)	0	0
Exercised (in shares)	0	0
Canceled (in shares)	0	0
Forfeited (in shares)	0	0
Expired (in shares)	0	0
Outstanding, Ending Balance (in shares)	36,331	36,331	36,331
Vested and expected to vest (in shares)	36,331	36,331
Exercisable (in shares)	5,625	3,750