FAIR VALUE MEASUREMENTS AND INVESTMENTS (Details 3) (USD $) In Thousands | Sep. 30, 2011 |
|---|---|
| Investments | |
| Short-term investments | $ 5,367 |
Certificates of deposit | |
| Investments | |
| Short-term investments | 3,350 |
Short term bonds | |
| Investments | |
| Short-term investments | $ 2,017 |