Commitments and Contingencies - Additional Information (Details)	6 Months Ended
Oct. 31, 2020 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Letters of credit outstanding amount	$ 2,100,000
Provision for indemnification claims	$ 0

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

No definition available.

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant