|
Goodwill and Other Intangible Assets - Carrying Amount and Accumulated Amortization of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified |
Aug. 31, 2012
|
Aug. 31, 2011
|
|---|---|---|
| Acquired Finite-Lived Intangible Assets [Line Items] | ||
| Carrying Amount | $ 2,038 | $ 1,768 |
| Accumulated Amortization | 1,571 | 1,436 |
|
Patents [Member]
|
||
| Acquired Finite-Lived Intangible Assets [Line Items] | ||
| Carrying Amount | 1,748 | 1,768 |
| Accumulated Amortization | 1,500 | 1,436 |
|
Customer Lists [Member]
|
||
| Acquired Finite-Lived Intangible Assets [Line Items] | ||
| Carrying Amount | 190 | |
| Accumulated Amortization | 59 | |
|
Non-Compete Agreements [Member]
|
||
| Acquired Finite-Lived Intangible Assets [Line Items] | ||
| Carrying Amount | 100 | |
| Accumulated Amortization | $ 12 |