Net Income (Loss) Per Share (Details 1) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jan. 31, 2022	Oct. 31, 2021	Jan. 31, 2021	Oct. 31, 2020	Jan. 31, 2022	Jan. 31, 2021
Numerator:
Net income (loss)	$ (40,681)	$ (51,276)	$ (8,652)	$ (20,190)	$ (91,957)	$ (28,842)
Net income (loss) per share:
Basic (in dollars per share)	$ (0.49)		$ (0.10)		$ (1.10)	$ (0.34)
Diluted (in dollars per share)	$ (0.49)		$ (0.10)		$ (1.10)	$ (0.34)
Weighted average shares used in computing net income (loss) per share:
Basic (in shares)	83,413,643		83,830,624		83,430,693	83,737,889
Diluted (in shares)	83,413,643		83,830,624		83,430,693	83,737,889