Equity (Details 1) - Warrant [Member] - $ / shares	3 Months Ended
	Oct. 31, 2017	Jul. 31, 2017
Class of Warrant or Right [Line Items]
Warrants Outstanding, Ending Balance	98,154	111,378
Warrants Outstanding, Weighted-Average Remaining Life In Years	1 year 4 months 24 days
Warrants Outstanding, Weighted-average Exercise Price	$ 70.35	$ 43.68
Warrants Outstanding, Number Exercisable	98,154
$ 34.70 [Member]
Class of Warrant or Right [Line Items]
Warrants Outstanding, Ending Balance	74,004
Warrants Outstanding, Weighted-Average Remaining Life In Years	1 year 1 month 6 days
Warrants Outstanding, Weighted-average Exercise Price	$ 34.70
Warrants Outstanding, Number Exercisable	74,004
$ 179.18 - $180.48 [Member]
Class of Warrant or Right [Line Items]
Warrants Outstanding, Ending Balance	24,150
Warrants Outstanding, Weighted-Average Remaining Life In Years	1 year 1 month 6 days
Warrants Outstanding, Weighted-average Exercise Price	$ 179.61
Warrants Outstanding, Number Exercisable	24,150