Related Party Transactions (Details)		1 Months Ended				3 Months Ended
		Sep. 30, 2020 USD ($)	Jun. 30, 2020	Jun. 30, 2019 USD ($)	Jan. 31, 2018 USD ($) renewalPeriod shares	Jul. 31, 2021 USD ($)	Jul. 31, 2020 USD ($)	Apr. 30, 2021 USD ($)	Apr. 30, 2020 USD ($)
Related Party Transaction [Line Items]
Contract liabilities						$ 99,897,000	$ 107,244,000	$ 75,227,000	$ 60,295,000
Accounts receivable, net, from related party						1,259,000		15,180,000
Deferred revenue, current	[1]					98,217,000		72,263,000
Accounts payable, from related party						112,000		56,000
Software Subscription Agreement | Baker Hughes Company
Related Party Transaction [Line Items]
Revenue commitment, fiscal year 2020				$ 46,700,000
Revenue commitment, fiscal year 2021				53,300,000
Revenue commitment, fiscal year 2022				75,000,000
Revenue commitment, fiscal year 2023				125,000,000
Revenue commitment, fiscal year 2024				$ 150,000,000
Chief Executive Officer (CEO)
Related Party Transaction [Line Items]
Notes receivable					$ 24,500,000
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		$ 26,000,000
Baker Hughes Company | Software Subscription Agreement
Related Party Transaction [Line Items]
Revenue commitment, term			5 years	3 years
Related party revenue						16,100,000
Sales commissions, recognized as deferred costs						8,300,000		$ 8,300,000
Deferred costs, sales commissions, amortization period								5 years
Deferred costs, sales commissions, prepaid expense and other current assets						1,700,000		$ 1,700,000
Deferred costs, sales commissions, other assets, non-current						6,200,000		6,600,000
Deferred costs, sales commissions, amortization						$ 400,000
Deferred costs, sales commissions, term						3 years
Sales commissions paid						$ 3,400,000
Due to related parties, current						2,600,000		3,400,000
Due to related parties, noncurrent						2,400,000		4,900,000
Contract liabilities							0
Accounts receivable, net, from related party						1,300,000		15,200,000
Deferred revenue, current						24,600,000		7,700,000
Costs of subscription revenue						100,000	0
Accounts payable, from related party						100,000		$ 100,000
Baker Hughes Company | Subscription | Software Subscription Agreement
Related Party Transaction [Line Items]
Related party revenue						10,200,000	6,800,000
Baker Hughes Company | Professional services | Software Subscription Agreement
Related Party Transaction [Line Items]
Related party revenue						$ 2,100,000	$ 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 $24,637 and $7,697 as of July 31, 2021 and April 30, 2021, respectively.