Employee benefit plans (Details) - Schedule of contributions plan - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jul. 31, 2019 |
Jul. 31, 2018 |
Jul. 31, 2017 |
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| Schedule of contributions plan [Abstract] | |||
| Employer contributions | $ 165 | $ 208 | $ 205 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. No definition available.
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