Related Party Transactions (Details) $ in Thousands		1 Months Ended					3 Months Ended		6 Months Ended
		Oct. 31, 2021 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020	Jun. 30, 2019 USD ($)	Jan. 31, 2018 USD ($) renewalPeriod shares	Oct. 31, 2021 USD ($)	Oct. 31, 2020 USD ($)	Oct. 31, 2021 USD ($)	Oct. 31, 2020 USD ($)	Apr. 30, 2021 USD ($)	Apr. 30, 2020 USD ($)
Related Party Transaction [Line Items]
Deferred revenue		$ 72,881					$ 72,881	$ 81,956	$ 72,881	$ 81,956	$ 75,227	$ 60,295
Accounts receivable, net, from related party		9,384					9,384		9,384		15,180
Deferred revenue, current	[1]	71,901					71,901		71,901		72,263
Accounts payable, from related party		84					84		84		56
Commissions payable to a related party		18,448					18,448		18,448		3,413
Software Subscription Agreement | Baker Hughes Company
Related Party Transaction [Line Items]
Revenue commitment, fiscal year 2020					$ 46,700
Revenue commitment, fiscal year 2021					53,300
Revenue commitment, fiscal year 2022					75,000
Revenue commitment, fiscal year 2023		85,000			125,000		85,000		85,000
Revenue commitment, fiscal year 2024		110,000			$ 150,000		110,000		110,000
Revenue commitment, fiscal year 2025		$ 125,000					125,000		125,000
Chief Executive Officer (CEO)
Related Party Transaction [Line Items]
Notes receivable						$ 24,500
Notes receivable, term						5 years
Notes receivable, number of renewal periods | renewalPeriod						4
Notes receivable, renewal period						1 year
Interest rate						2.18%
Proceeds from notes receivable payment			$ 26,000
Baker Hughes Company | Software Subscription Agreement
Related Party Transaction [Line Items]
Revenue commitment, term		6 years		5 years	3 years
Sales commissions, recognized as deferred costs		$ 16,000					$ 16,000		$ 16,000		$ 8,300
Deferred costs, sales commissions, amortization period		5 years					5 years		5 years		3 years
Related party revenue									$ 36,700
Deferred revenue		$ 18,700					$ 18,700		18,700		$ 8,500
Commitments from non-cancellable contracts		282,300					282,300		282,300		95,500
Accounts receivable, net, from related party		9,400					9,400		9,400		15,200
Deferred revenue, current		17,500					17,500		17,500		7,700
Costs of subscription revenue							0	0	100	0
Accounts payable, from related party		100					100		100		100
Deferred costs, sales commissions, prepaid expense and other current assets		5,000					5,000		5,000		1,700
Deferred costs, sales commissions, other assets, non-current		18,600					18,600		18,600		6,600
Deferred costs, sales commissions, amortization							400		800
Sales commissions paid									3,400
Commissions payable to a related party		18,500					18,500		18,500		3,400
Due to related parties, noncurrent		$ 2,400					2,400		2,400		$ 4,900
Baker Hughes Company | Subscription | Software Subscription Agreement
Related Party Transaction [Line Items]
Related party revenue							10,000	6,800	20,200	13,600
Baker Hughes Company | Professional services | Software Subscription Agreement
Related Party Transaction [Line Items]
Related party revenue							$ 5,900	$ 0	$ 8,000	$ 0
Series F Preferred Stock | Chief Executive Officer (CEO)
Related Party Transaction [Line Items]
Stock issued during period (in shares) | shares						1,251,921

[1] Including amounts from a related party of $17,516 and $7,697 as of October 31, 2021 and April 30, 2021, respectively.