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Net Loss Per Share Attributable to Common Stockholders - Potential Shares Excluded From Computation of Diluted Net Loss Per Share (Details) - shares
12 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Apr. 30, 2023
Stock options      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Potentially antidilutive shares excluded from computation of net loss per share (in shares) 28,477,000 31,371,000 34,844,000
RSUs      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Potentially antidilutive shares excluded from computation of net loss per share (in shares) 23,774,000 19,283,000 21,146,000
ESPP      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Potentially antidilutive shares excluded from computation of net loss per share (in shares) 1,349,000 731,000 1,525,000