Stockholders' Equity - Schedule of 2017 Nonvested Share Activity (Details) - Employee Stock Option - 2017 Plan	3 Months Ended
	Oct. 31, 2017 $ / shares shares
Number of Shares
Non-vested, beginning balance (in shares)	0
Options granted (in shares)	(206,500)
Vested (in shares)	0
Non-vested, ending balance (in shares)	206,500
Weighted Average Grant Date Fair Value Per Share
Granted (in dollars per share) | $ / shares	$ 38.82
Non-vested (in dollars per share) | $ / shares	$ 38.82