|
Net Income (Loss) Per Common Share - Computation of Net Loss Per Share (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jan. 31, 2015
|
Jan. 31, 2014
|
Jan. 31, 2015
|
Jan. 31, 2014
|
|
| Earnings Per Share [Abstract] | ||||
| Net income (loss) | $ 5,683 | $ (10,701) | $ 8,426 | $ (18,528) |
| Weighted-average shares outstanding - basic | 107,891 | 107,153 | 108,132 | 109,608 |
| Dilutive effect of potential shares | 5,502 | 0 | 6,579 | 0 |
| Weighted-average shares outstanding - diluted | 113,393 | 107,153 | 114,711 | 109,608 |
| Net income (loss) per share - basic (in dollars per share) | $ 0.05 | $ (0.10) | $ 0.08 | $ (0.17) |
| Net income (loss) per share - diluted (in dollars per share) | $ 0.05 | $ (0.10) | $ 0.07 | $ (0.17) |