Related Party Transactions - Narrative (Details) $ / shares in Units, $ in Thousands		1 Months Ended					3 Months Ended		9 Months Ended
		Sep. 30, 2020 USD ($)	Jun. 30, 2020	Oct. 31, 2019 USD ($) transaction $ / shares shares	Jun. 30, 2019	Jan. 31, 2018 USD ($) renewalPeriod shares	Jan. 31, 2021 USD ($)	Jan. 31, 2020 USD ($)	Jan. 31, 2021 USD ($)	Jan. 31, 2020 USD ($)	Apr. 30, 2020 USD ($)
Related Party Transaction [Line Items]
Stock repurchased in period, per share (in dollars per share) | $ / shares				$ 30.2310
Accounts receivable, net, from related party							$ 1,030		$ 1,030		$ 250
Deferred revenue, current	[1]						59,950		59,950		53,537
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
Chief Executive Officer (CEO) | Secondary Stock Sale to Existing Shareholder
Related Party Transaction [Line Items]
Number of secondary transactions | transaction				2
Total proceeds				$ 50,000
Officers and Employees
Related Party Transaction [Line Items]
Stock repurchased in period, per share (in dollars per share) | $ / shares				$ 30.2310
Baker Hughes Company
Related Party Transaction [Line Items]
Related party revenue									21,600
Accounts receivable, net, from related party							1,000		1,000		200
Deferred revenue, current							9,400		9,400		$ 1,500
Baker Hughes Company | Software Subscription Agreement
Related Party Transaction [Line Items]
Revenue commitment, term			5 years		3 years
Baker Hughes Company | Subscription
Related Party Transaction [Line Items]
Related party revenue							$ 8,000	$ 9,900	$ 21,600	$ 30,600
Series F Preferred Stock | Chief Executive Officer (CEO)
Related Party Transaction [Line Items]
Stock issued during period (in shares) | shares						1,251,921
Series D Preferred Stock | Chief Executive Officer (CEO) | Secondary Stock Sale to Existing Shareholder | Existing Stockholder, Transaction One
Related Party Transaction [Line Items]
Sale of stock, number of shares (in shares) | shares				1,685,979
Sale of stock, shares issued, price per share (in dollars per share) | $ / shares				$ 26.6034
Series D Preferred Stock | Chief Executive Officer (CEO) | Secondary Stock Sale to Existing Shareholder | Existing Stockholder, Transaction Two
Related Party Transaction [Line Items]
Sale of stock, number of shares (in shares) | shares				825,012
Sale of stock, shares issued, price per share (in dollars per share) | $ / shares				$ 24.0000
Series E Preferred Stock | Chief Executive Officer (CEO) | Secondary Stock Sale to Existing Shareholder | Existing Stockholder, Transaction One
Related Party Transaction [Line Items]
Sale of stock, number of shares (in shares) | shares				193,489
Sale of stock, shares issued, price per share (in dollars per share) | $ / shares				$ 26.6034
Series C Preferred Stock | Chief Executive Officer (CEO) | Secondary Stock Sale to Existing Shareholder | Existing Stockholder, Transaction Two
Related Party Transaction [Line Items]
Sale of stock, number of shares (in shares) | shares				584,795
Sale of stock, shares issued, price per share (in dollars per share) | $ / shares				$ 24.0000
Redeemable Convertible A-1 Common Stock | Chief Executive Officer (CEO) | Secondary Stock Sale to Existing Shareholder | Existing Stockholder, Transaction Two
Related Party Transaction [Line Items]
Sale of stock, number of shares (in shares) | shares				673,526
Sale of stock, shares issued, price per share (in dollars per share) | $ / shares				$ 24.0000

[1] Including amounts from a related party of $9,358 and $1,499 as of January 31, 2021 and April 30, 2020, respectively.