Operating Segments - Concentration Risk (Details) - Segment sales - Customer concentration |
9 Months Ended |
|---|---|
|
Apr. 30, 2017
customer
| |
| Water Purification and Filtration | Two customers | |
| Concentration risk | |
| Number of customers accounting for a percentage of segment net sales | 2 |
| Concentration risk within segment (as a percent) | 50.70% |
| Healthcare Disposables | Four customers | |
| Concentration risk | |
| Number of customers accounting for a percentage of segment net sales | 4 |
| Concentration risk within segment (as a percent) | 50.40% |
| Dialysis | Two customers | |
| Concentration risk | |
| Number of customers accounting for a percentage of segment net sales | 2 |
| Concentration risk within segment (as a percent) | 38.80% |