Description of Business and Summary of Significant Accounting Policies (Details 3) - USD ($) |
12 Months Ended | |
|---|---|---|
Jul. 31, 2016 |
Jul. 31, 2015 |
|
| Reserves deducted from accounts receivable: | ||
| Allowance for doubtful accounts, Balance at beginning of year | ||
| Allowance for doubtful accounts, Additional changed to cost and expenses | ||
| Allowance for doubtful accounts, Deductions | ||
| Allowance for doubtful accounts, Balance at end of year | ||