Loan Payable (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Debt Disclosure [Abstract]
Line of Credit Facility Expiration Month and Year	December2016
Line of Credit Facility, Maximum Borrowing Capacity	$ 8,000
Line of Credit Facility Additional Borrowings Capacity	4,000
Unamortized Debt Issuance Expense	281
Unamortized Debt Issuance Cost Included in Prepaid Expenses	$ 28	$ 111
LIBOR Rate Period	3 months
Debt Instrument, Description of Variable Rate Basis	three month LIBOR rate, with a floor of 1.25% plus an applicable margin of 4.0%
Debt Instrument, Basis Spread on Variable Rate	1.25%
Debt Instrument Margin on Variable Rate	4.00%
Nominal Interest Rate	5.25%	5.25%
Debt Instrument Increase in Interest Rate on Default	3.00%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.50%
Debt Instrument, Interest Rate During Period	11.40%	10.50%	10.60%
Long-term Line of Credit	$ 1,557	$ 3,013
Line of Credit Facility, Remaining Borrowing Capacity	6,200
Line of Credit Facility Minimum Borrowings	2,000
Line of Credit Facility Minimum Liquidity Requirement	3,000
Line of Credit Facility Minimum Liquidity Current	11,200
Line of Credit Facility Minimum Cash Burn	0
Line of Credit Facility Cash Burn Current	$ 1,300