Stockholders' Equity (Details) - Schedule of stock option plans $ / shares in Units, $ in Thousands	6 Months Ended
	Jan. 31, 2018 USD ($) $ / shares shares
Schedule of stock option plans [Abstract]
Outstanding at July 31, 2017 | shares	2,130,995
Outstanding at July 31, 2017 | $ / shares	$ 4.26
Awarded | shares	112,580
Awarded | $ / shares	$ 8.36
Exercised | shares	(569,602)
Exercised | $ / shares	$ 3.02
Exercised | $	$ 5,594
Cancelled or expired | shares	(26,334)
Cancelled or expired | $ / shares	$ 5.82
Outstanding at end of period | shares	1,647,639
Outstanding at end of period | $ / shares	$ 4.95
Outstanding at end of period	2 years 292 days
Outstanding at end of period | $	$ 6,785
Exercisable at end of period | shares	1,109,811
Exercisable at end of period | $ / shares	$ 4.18
Exercisable at end of period	1 year 146 days
Exercisable at end of period | $	$ 3,533