Royalty and other income (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jul. 31, 2017 |
Jul. 31, 2016 |
Jul. 31, 2015 |
|
| Royalty and other income (Details) [Line Items] | |||
| Patent Expiration Date | Apr. 24, 2018 | ||
| Life Sciences [Member] | |||
| Royalty and other income (Details) [Line Items] | |||
| Royalty Revenue | $ 1,205 | $ 1,521 | $ 2,495 |
| X | ||||||||||
- Definition Patent expiration date. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Revenue earned during the period from the leasing or otherwise lending to a third party the entity's rights or title to certain property. Royalty revenue is derived from a percentage or stated amount of sales proceeds or revenue generated by the third party using the entity's property. Examples of property from which royalties may be derived include patents and oil and mineral rights. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|