|
Stock-Based Compensation - Schedule of Employee Service Share-Based Compensation, Allocation of Recognized Period Costs (Detail) (USD $)
In Thousands, unless otherwise specified
|
3 Months Ended |
|
Nov. 30, 2012
|
Nov. 30, 2011
|
| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |
|
|
| Total stock-based compensation expense |
$ 417 |
$ 238 |
| Total stock-based compensation expense |
417 |
238 |
| Income tax benefit |
158 |
90 |
| Total stock-based compensation expense, net of tax |
259 |
148 |
|
Cost of Sales [Member]
|
|
|
| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |
|
|
| Total stock-based compensation expense |
|
25 |
|
Operating Expense [Member]
|
|
|
| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |
|
|
| Total stock-based compensation expense |
417 |
203 |
|
Research and Development Expense [Member]
|
|
|
| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |
|
|
| Total stock-based compensation expense |
|
$ 10 |