Acquisitions - Accutron, Inc. (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Jul. 31, 2018 |
Jul. 31, 2017 |
|
| Accutron | ||
| Business Acquisition [Line Items] | ||
| Total consideration for the transaction, excluding acquisition-related costs | $ 53,049 | $ 53,049 |