Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jul. 31, 2016	Jul. 31, 2015
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 75	$ 89
Convertible preferred stock, par value	$ 0.001	$ 0.001
Convertible preferred stock, shares authorized	200,000,000	200,000,000
Convertible preferred stock, shares issued	0	0
Convertible preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	30,440,809	29,386,481
Common stock, shares outstanding	30,440,809	29,386,481