Fair Value Measurements Narrative (Details) - USD ($) |
Apr. 30, 2016 |
Jul. 31, 2015 |
|---|---|---|
| Fair Value, Inputs, Level 1 | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis | ||
| Cash Equivalents | $ 6,277,000 | $ 9,297,000 |
| Fair Value, Inputs, Level 2 | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis | ||
| Notes Payable, Fair Value | $ 16,598,000 | $ 20,476,000 |