|
Short-Term and Long-Term Investments (Details) (USD $)
In Thousands, unless otherwise specified |
Oct. 31, 2012
|
Oct. 31, 2011
|
|---|---|---|
| Long Term Investments | ||
| Amortized Cost | $ 49,987 | $ 49,933 |
| Gross Unrealized Gains | 70 | 331 |
| Gross Unrealized Losses | 0 | 0 |
| Estimated Fair Value | 50,057 | 50,264 |
|
U.S. government obligations [Member]
|
||
| Long Term Investments | ||
| Amortized Cost | 49,987 | 49,933 |
| Gross Unrealized Gains | 70 | 331 |
| Gross Unrealized Losses | 0 | 0 |
| Estimated Fair Value | $ 50,057 | $ 50,264 |