Fair Value of Financial Instruments (Tables)

12 Months Ended

Jul. 31, 2017

Fair Value Disclosures [Abstract]

Schedule of Derivative Liabilities at Fair Value

The following table provides a reconciliation of the beginning and ending balances of the derivative liabilities for the years ended July 31, 2017 and 2016:

Fair Value of Significant Unobservable Inputs (Level 3)

	Warrant
	Liability
Balance at July 31, 2015	$	4,000
Issuances		9,867,000
Settlement of warrant liability		(13,550,000	)
Adjustments to estimated fair value		5,481,000
Balance at July 31, 2016	$	1,802,000
Issuances		—
Settlement of warrant liability		(226,000	)
Adjustments to estimated fair value		277,000
Balance at July 31, 2017	$	1,853,000