Net Income (Loss) Per Share (Details 1) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Numerator:
Net income (loss)	$ (20,190)	$ (14,991)
Net income (loss) per share:
Basic (in dollars per share)	$ (0.24)	$ (0.18)
Diluted (in dollars per share)	$ (0.24)	$ (0.18)
Weighted average shares used in computing net income (loss) per share:
Basic (in shares)	83,613,287	82,360,891
Weighted average effect of dilutive stock options (in shares)	0	0
Weighted average effect of dilutive stock awards (in shares)	0	0
Diluted (in shares)	83,613,287	82,360,891