Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Revenue - Disaggregated Revenue by Geographic Region (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Disaggregation of Revenue [Line Items]
Total revenue	$ 252,759	$ 183,217	$ 156,666
North America
Disaggregation of Revenue [Line Items]
Total revenue	197,485	119,795	121,485
Europe, the Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenue	46,251	56,030	33,086
Asia Pacific
Disaggregation of Revenue [Line Items]
Total revenue	9,023	5,992	2,095
Rest of World
Disaggregation of Revenue [Line Items]
Total revenue	$ 0	$ 1,400	$ 0
United States \| Revenue \| Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Geographic concentration risk, percentage	78.00%	65.00%	78.00%
France \| Revenue \| Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Geographic concentration risk, percentage		12.00%	10.50%
Netherlands \| Revenue \| Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Geographic concentration risk, percentage		12.00%