Expiration date of warrants held.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount of expense (income) related to adjustment to fair value of warrant liability.

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Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

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The cash inflow associated with the amount received from holders exercising their stock warrants.

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Loan Payable (Details) - USD ($)		3 Months Ended	9 Months Ended
Loan Payable (Details) - USD ($)	Feb. 06, 2017	Apr. 30, 2017	Apr. 30, 2017	Jul. 31, 2016
Debt Instrument [Line Items]
Borrowed from investors		$ 10,256,000	$ 10,256,000
Class B common stock [Member]
Debt Instrument [Line Items]
Warrant issued to purchase common stock	252,161		147,682
Warrants exercise price	$ 34.70
Warrants expire date	Dec. 31, 2018
Proceeds from aggregate warrants	$ 7,500,000
Loan Agreement [Member]
Debt Instrument [Line Items]
Borrowed from investors	$ 17,500,000
Interest rate	5.00%
Interest rate, Increase (Decrease)	10.00%
Loan maturity date	Dec. 29, 2017
Payments of initial civil penalty	$ 15,000,000
Payments of first installment			$ 5,125,000
Warrant issued to purchase common stock			147,682
Percentage of warrant description	The Lenders will receive additional warrants on a monthly basis with an aggregate exercise price equal to 10% (dropping to 7.5% in September 2017) of the then outstanding Loan Amount.
Fair value of warrants			$ 4,040,000
Risk-free rate			1.16%
Dividend yield			0.00%
Volatility			96.68%
Expected term			1 year 11 months 1 day
Paid in cash for loan			$ 80,000
Amortization amount		2,001,000	2,001,000
Interest expense, debt		194,000	194,000
Loans payable		10,256,000	10,256,000
Unamortized debt discounts		$ 2,119,000	$ 2,119,000