Related Party Transactions (Details) $ in Thousands		1 Months Ended					3 Months Ended		9 Months Ended
		Oct. 31, 2021	Sep. 30, 2020 USD ($)	Jun. 30, 2020	Jun. 30, 2019 USD ($)	Jan. 31, 2018 USD ($) renewalPeriod shares	Jan. 31, 2022 USD ($)	Jan. 31, 2021 USD ($)	Jan. 31, 2022 USD ($)	Jan. 31, 2021 USD ($)	Apr. 30, 2021 USD ($)	Apr. 30, 2020 USD ($)
Related Party Transaction [Line Items]
Deferred revenue							$ 59,448	$ 62,310	$ 59,448	$ 62,310	$ 75,227	$ 60,295
Accounts receivable, net, from related party							15,727		15,727		15,180
Deferred revenue, current	[1]						58,524		58,524		72,263
Sales and marketing expenses	[2]						43,146	28,450	126,134	64,898
Accounts payable, from related party							2,415		2,415		56
Commissions payable to a related party							18,534		18,534		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					125,000		85,000		85,000
Revenue commitment, fiscal year 2024					$ 150,000		110,000		110,000
Revenue commitment, fiscal year 2025							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		$ 8,300
Deferred costs, sales commissions, amortization period							5 years		5 years		3 years
Related party revenue									$ 70,900
Deferred revenue							$ 2,300		2,300		$ 8,500
Commitments from non-cancellable contracts							234,900		234,900		95,500
Accounts receivable, net, from related party							15,700		15,700		15,200
Deferred revenue, current							600		600		7,700
Costs of subscription revenue							200	0	400	0
Sales and marketing expenses							2,400	0	2,600	0
Accounts payable, from related party							2,400		2,400		100
Deferred costs, sales commissions, prepaid expense and other current assets							5,000		5,000		1,700
Deferred costs, sales commissions, other assets, non-current							17,400		17,400		6,600
Deferred costs, sales commissions, amortization							1,200		2,000
Sales commissions paid									3,400
Commissions payable to a related party							18,500		18,500		3,400
Due to related parties, noncurrent							2,400		2,400		$ 4,900
Baker Hughes Company | Subscription | Software Subscription Agreement
Related Party Transaction [Line Items]
Related party revenue							19,700	8,000	40,000	21,600
Baker Hughes Company | Professional services | Software Subscription Agreement
Related Party Transaction [Line Items]
Related party revenue							$ 4,900	$ 0	$ 12,900	$ 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 $575 and $7,697 as of January 31, 2022 and April 30, 2021, respectively.

[2] Including related party sales and marketing expense of $2,398 and nil for the three months ended January 31, 2022 and 2021, respectively, and $2,590 and nil for the nine months ended January 31, 2022 and 2021, respectively.