Stockholders' Equity (Schedule of Outstanding Options and Warrants) (Details) (USD $)	9 Months Ended	12 Months Ended
	Apr. 30, 2015	Jul. 31, 2014
Options [Member]
Number of Shares
Outstanding, beginning balance	3,047,500
Granted	185,000
Forfeited/expired/cancelled	(85,000)
Outstanding, ending balance	3,147,500	3,047,500
Exercisable	1,654,583
Weighted- average Exercise Price
Outstanding	$ 9.00
Granted	$ 11.41
Forfeited/expired/cancelled	$ 11.21
Outstanding	$ 9.42	$ 9.00
Exercisable	$ 10.40
Weighted- average Remaining Contractual Term (years)
Granted	5 years
Outstanding	7 years 10 months 2 days	8 years 6 months 22 days
Exercisable	7 years 10 months 24 days
Aggregate Intrinsic Value
Outstanding	$ 285,000
Exercisable	285,000
Warrants [Member]
Number of Shares
Outstanding, beginning balance	1,254,752
Granted	83,800
Exercised
Outstanding, ending balance	1,338,552	1,254,752
Exercisable	613,552
Weighted- average Exercise Price
Outstanding	$ 20.00
Granted	$ 9.07
Outstanding	$ 19.53	$ 20.00
Exercisable	$ 24.88
Weighted- average Remaining Contractual Term (years)
Granted
Outstanding	3 years 9 months 18 days	4 years 3 months 29 days
Exercisable	5 years 1 month 20 days
Aggregate Intrinsic Value
Outstanding
Exercisable