Balance Sheet Components - Schedule of Activity of Deferred Contract Acquisition Costs (Details) - USD ($) $ in Thousands	6 Months Ended
Oct. 31, 2020	Oct. 31, 2019
Contract Acquisition Cost [Roll Forward]
Beginning balance	$ 43,549	$ 26,150
Capitalization of contract acquisition costs	39,107	17,005
Amortization of deferred contract acquisition costs	(18,173)	(13,921)
Ending balance	$ 64,483	$ 29,234

Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054

Name:	us-gaap_CapitalizedContractCostNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant