Net Sales by Geographic Area along with Long-Lived Assets by Location (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 |
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Sales to unaffiliated customers |
$ 103,635
|
$ 82,237
|
$ 263,845
|
$ 232,972
|
|
| Long-lived assets |
26,965
|
|
26,965
|
|
$ 25,483
|
| United States |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Sales to unaffiliated customers |
23,223
|
11,420
|
49,928
|
45,335
|
|
| Long-lived assets |
12,934
|
|
12,934
|
|
11,004
|
| Taiwan |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Sales to unaffiliated customers |
13,654
|
6,686
|
39,208
|
22,757
|
|
| Long-lived assets |
404
|
|
404
|
|
243
|
| Philippines |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Sales to unaffiliated customers |
14,582
|
9,100
|
32,975
|
25,982
|
|
| Long-lived assets |
100
|
|
100
|
|
186
|
| Malaysia |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Sales to unaffiliated customers |
8,318
|
4,619
|
21,447
|
14,621
|
|
| Long-lived assets |
3,040
|
|
3,040
|
|
3,146
|
| Thailand |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Sales to unaffiliated customers |
5,251
|
6,640
|
17,217
|
16,924
|
|
| Hong Kong / China |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Sales to unaffiliated customers |
14,943
|
16,621
|
31,464
|
40,654
|
|
| Germany |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Sales to unaffiliated customers |
6,615
|
7,297
|
20,694
|
18,201
|
|
| Long-lived assets |
8,512
|
|
8,512
|
|
8,457
|
| Singapore |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Sales to unaffiliated customers |
5,197
|
8,150
|
17,464
|
15,853
|
|
| Long-lived assets |
442
|
|
442
|
|
784
|
| All Other Countries |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Sales to unaffiliated customers |
11,852
|
$ 11,704
|
33,448
|
$ 32,645
|
|
| Long-lived assets |
462
|
|
462
|
|
484
|
| Japan |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Long-lived assets |
842
|
|
842
|
|
878
|
| China |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Long-lived assets |
$ 229
|
|
$ 229
|
|
$ 301
|