Revenue - Disaggregated Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022
Disaggregation of Revenue [Line Items]
Total revenue	$ 66,669	$ 69,773	$ 194,385	$ 180,442
North America
Disaggregation of Revenue [Line Items]
Total revenue	$ 55,254	$ 56,846	$ 155,108	$ 136,995
United States | Revenue | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Geographic concentration risk, percentage	83.00%	81.00%	80.00%	76.00%
Europe, the Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenue	$ 9,546	$ 11,108	$ 32,138	$ 36,116
France | Revenue | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Geographic concentration risk, percentage		8.00%		11.00%
Asia Pacific
Disaggregation of Revenue [Line Items]
Total revenue	1,801	$ 1,819	6,603	$ 7,331
Rest of World
Disaggregation of Revenue [Line Items]
Total revenue	$ 68	$ 0	$ 536	$ 0