v3.23.1
Net loss per share attributable to common stockholders - Computation (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Numerator:      
Net loss attributable to common stockholders $ (217,863) $ (152,098) $ (139,931)
Denominator:      
Weighted-average shares used in computing net loss per share, basic (in shares) 53,885 48,251 39,190
Weighted-average shares used in computing net loss per share, diluted (in shares) 53,885 48,251 39,190
Net loss per share attributable to common stockholders—basic (in dollars per share) $ (4.04) $ (3.15) $ (3.57)
Net loss per share attributable to common stockholders—diluted (in dollars per share) $ (4.04) $ (3.15) $ (3.57)