Subsequent events	3 Months Ended
	Jul. 31, 2021
Subsequent Events [Abstract]
Subsequent events	Subsequent eventsOn August 25, 2021, the Company entered into a new lease to acquire approximately 283,015 square feet of office space in several phases in Redwood City, California. The lease is expected to be commenced in January 2022, when the landlord is expected to deliver the first two phases of leased space to the Company. Total undiscounted base rent payments over the term of this lease are approximately $103.1 million. In addition to base rent, the Company will be responsible for the Company’s allocated share of costs incurred and expenditures made by the landlord in the operation and management of the leased space. Under the terms of the lease agreement, the Company has a rent abatement with respect to each phase for the initial six months following the rent commencement date for such phase, with initial monthly base rent payments expected to commence April 1, 2023, which will be approximately $0.5 million at commencement and will increase up to a maximum monthly base rent of approximately $1.0 million. The lease agreement also includes an aggregate tenant improvement allowance of $44.2 million for certain costs. The term of the lease is 126 months from the date that rent commences with respect to phase one of the Leased Space, which will be nine months after the date when phase one of the Leased Space is delivered to the Company. Pursuant to the lease agreement, the Company provided the landlord an unconditional and irrevocable letter of credit of $12.6 million, which is subject to reduction pursuant to the terms of the lease agreement.