Stockholders' Equity (Details 2)	6 Months Ended
	Jan. 31, 2017 $ / shares shares
Number of Options
Non-vested, Beginning Balance | shares	90,833
Granted | shares	120,000
Vested | shares	(48,470)
Non-vested, Ending Balance | shares	162,363
Weighted Average Grant Date Fair Value
Non-vested, Beginning Balance | $ / shares	$ 7.27
Granted | $ / shares	7.2
Vested | $ / shares	7.1
Non-vested, Ending Balance | $ / shares	$ 7.3