Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2026	Jul. 31, 2025
Lessee, Lease, Description [Line Items]
Operating leases, rent expense	$ 457	$ 453
Weighted average remaining lease term (in years)	10 years 7 months 6 days	3 years 6 months 3 days
Weighted average discount rate, percent	8.75%	5.89%
Corporate Headquarters
Lessee, Lease, Description [Line Items]
Operating leases, rent expense	$ 20	$ 19
Rockville, MD
Lessee, Lease, Description [Line Items]
Operating leases, rent expense	437	422
Additional recognition of operating lease right-of-use assets and operating lease liabilities	6,300
Milan Italy
Lessee, Lease, Description [Line Items]
Operating leases, rent expense	$ 0	$ 13