Reportable Segment Information (Detail) - USD ($)
$ in Thousands |
3 Months Ended |
9 Months Ended |
|
Apr. 30, 2017 |
Apr. 30, 2016 |
Apr. 30, 2017 |
Apr. 30, 2016 |
Jul. 31, 2016 |
| Product revenue: |
|
|
|
|
|
|
| Product revenue |
|
$ 120,791
|
$ 126,376
|
$ 371,373
|
$ 366,443
|
|
| Engineering revenue: |
|
|
|
|
|
|
| Engineering revenue |
|
1,371
|
1,604
|
3,448
|
4,354
|
|
| Net revenue: |
|
|
|
|
|
|
| Total net revenue |
|
122,162
|
127,980
|
374,821
|
370,797
|
|
| Income (loss) from operations: |
|
|
|
|
|
|
| Total (loss) income from operations |
|
(64,603)
|
7,626
|
(51,195)
|
11,123
|
|
| Total other income (loss), net |
|
100
|
(900)
|
(400)
|
(4,900)
|
|
| (Loss) income before income taxes |
|
(64,546)
|
6,692
|
(51,552)
|
6,224
|
|
| Identifiable total assets by segment: |
|
|
|
|
|
|
| Assets |
|
567,677
|
|
567,677
|
|
$ 632,897
|
| Total Identifiable Assets |
|
|
|
|
|
|
| Identifiable total assets by segment: |
|
|
|
|
|
|
| Assets |
|
565,300
|
|
565,300
|
|
559,000
|
| Reportable segments |
|
|
|
|
|
|
| Identifiable total assets by segment: |
|
|
|
|
|
|
| Assets |
|
372,200
|
|
372,200
|
|
393,400
|
| Corporate |
|
|
|
|
|
|
| Identifiable total assets by segment: |
|
|
|
|
|
|
| Identifiable assets (excluding goodwill) |
[1] |
193,100
|
|
193,100
|
|
165,600
|
| Medical Imaging |
|
|
|
|
|
|
| Product revenue: |
|
|
|
|
|
|
| Product revenue |
|
68,200
|
71,900
|
205,900
|
208,700
|
|
| Engineering revenue: |
|
|
|
|
|
|
| Engineering revenue |
|
1,300
|
900
|
3,100
|
2,600
|
|
| Net revenue: |
|
|
|
|
|
|
| Total net revenue |
|
69,500
|
72,900
|
209,000
|
211,300
|
|
| Income (loss) from operations: |
|
|
|
|
|
|
| Total (loss) income from operations |
|
12,200
|
10,200
|
31,300
|
28,200
|
|
| Medical Imaging | Reportable segments |
|
|
|
|
|
|
| Identifiable total assets by segment: |
|
|
|
|
|
|
| Assets |
|
182,800
|
|
182,800
|
|
191,100
|
| Ultrasound |
|
|
|
|
|
|
| Product revenue: |
|
|
|
|
|
|
| Product revenue |
|
34,800
|
36,800
|
110,700
|
115,900
|
|
| Engineering revenue: |
|
|
|
|
|
|
| Engineering revenue |
|
|
800
|
200
|
1,700
|
|
| Net revenue: |
|
|
|
|
|
|
| Total net revenue |
|
34,800
|
37,600
|
110,900
|
117,600
|
|
| Income (loss) from operations: |
|
|
|
|
|
|
| Total (loss) income from operations |
|
(79,300)
|
(5,000)
|
(89,700)
|
(19,500)
|
|
| Ultrasound | Reportable segments |
|
|
|
|
|
|
| Identifiable total assets by segment: |
|
|
|
|
|
|
| Assets |
|
146,800
|
|
146,800
|
|
152,500
|
| Security and Detection |
|
|
|
|
|
|
| Product revenue: |
|
|
|
|
|
|
| Product revenue |
|
17,800
|
17,600
|
54,800
|
41,800
|
|
| Engineering revenue: |
|
|
|
|
|
|
| Engineering revenue |
|
100
|
(100)
|
100
|
100
|
|
| Net revenue: |
|
|
|
|
|
|
| Total net revenue |
|
17,900
|
17,500
|
54,900
|
41,900
|
|
| Income (loss) from operations: |
|
|
|
|
|
|
| Total (loss) income from operations |
|
2,500
|
$ 2,400
|
7,200
|
$ 2,400
|
|
| Security and Detection | Reportable segments |
|
|
|
|
|
|
| Identifiable total assets by segment: |
|
|
|
|
|
|
| Assets |
|
$ 42,600
|
|
$ 42,600
|
|
$ 49,800
|
|
|