Equity (Details 1) - Warrant [Member]	12 Months Ended
	Jul. 31, 2017 $ / shares shares
Class of Warrant or Right [Line Items]
Warrants Outstanding, Ending Balance	111,378
Warrants Outstanding, Weighted-Average Remaining Life In Years	1 year 4 months 24 days
Weighted-average Exercise Price, Ending Balance | $ / shares	$ 43.68
Warrants Outstanding, Number Exercisable	111,378
$ 34.70 [Member]
Class of Warrant or Right [Line Items]
Warrants Outstanding, Ending Balance	104,479
Warrants Outstanding, Weighted-Average Remaining Life In Years	1 year 4 months 24 days
Weighted-average Exercise Price, Ending Balance | $ / shares	$ 34.70
Warrants Outstanding, Number Exercisable	104,479
$ 179.62 [Member]
Class of Warrant or Right [Line Items]
Warrants Outstanding, Ending Balance	6,899
Warrants Outstanding, Weighted-Average Remaining Life In Years	1 year 4 months 24 days
Weighted-average Exercise Price, Ending Balance | $ / shares	$ 179.62
Warrants Outstanding, Number Exercisable	6,899