Net Loss Per Share Attributable to Common Stockholders - Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Numerator
Net loss attributable to common stockholders	$ (39,447)	$ (16,852)	$ (133,645)	$ (31,646)
Class A Common Stock
Denominator
Basic weighted-average Class A common shares outstanding (in shares)	101,593,000	68,648,000	100,341,000	43,481,000
Diluted weighted-average Class A common shares outstanding (in shares)	101,593,000	68,648,000	100,341,000	43,481,000
Basic and diluted net loss per share attributable to common stockholders
Basic net loss per Class A common shares outstanding (in dollars per share)	$ (0.38)	$ (0.23)	$ (1.29)	$ (0.64)
Diluted net loss per Class A common shares outstanding (in dollars per share)	$ (0.38)	$ (0.23)	$ (1.29)	$ (0.64)
Class A-1 Common Stock
Denominator
Basic weighted-average Class A common shares outstanding (in shares)	0	6,667,000	0	6,667,000
Diluted weighted-average Class A common shares outstanding (in shares)	0	6,667,000	0	6,667,000
Basic and diluted net loss per share attributable to common stockholders
Basic net loss per Class A common shares outstanding (in dollars per share)	$ 0	$ (0.10)	$ 0	$ (0.52)
Diluted net loss per Class A common shares outstanding (in dollars per share)	$ 0	$ (0.10)	$ 0	$ (0.52)
Class B Common Stock
Denominator
Basic weighted-average Class A common shares outstanding (in shares)	3,500,000	3,500,000	3,500,000	3,500,000
Diluted weighted-average Class A common shares outstanding (in shares)	3,500,000	3,500,000	3,500,000	3,500,000
Basic and diluted net loss per share attributable to common stockholders
Basic net loss per Class A common shares outstanding (in dollars per share)	$ (0.38)	$ (0.13)	$ (1.29)	$ (0.12)
Diluted net loss per Class A common shares outstanding (in dollars per share)	$ (0.38)	$ (0.13)	$ (1.29)	$ (0.12)