|
Goodwill (Details) (USD $)
|
9 Months Ended | |
|---|---|---|
|
Apr. 30, 2011
|
Jul. 31, 2010
|
|
| Goodwill Gross | $ 150,603,000 | $ 150,603,000 |
| Goodwill Accumulated Impairment | (13,249,000) | (13,249,000) |
| Goodwill | 137,354,000 | 137,354,000 |
| Number of reportable operating segments | 3 | Â |
|
Telecommunications Transmission [Member]
|
 |  |
| Goodwill Gross | 107,779,000 | 107,779,000 |
| Goodwill Accumulated Impairment | 0 | 0 |
| Goodwill | 107,779,000 | 107,779,000 |
|
Mobile Data Communications [Member]
|
 |  |
| Goodwill Gross | 13,249,000 | 13,249,000 |
| Goodwill Accumulated Impairment | (13,249,000) | (13,249,000) |
| Goodwill | 0 | 0 |
|
R F Microwave Amplifiers [Member]
|
 |  |
| Goodwill Gross | 29,575,000 | 29,575,000 |
| Goodwill Accumulated Impairment | 0 | 0 |
| Goodwill | $ 29,575,000 | $ 29,575,000 |