|
Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |
|---|---|---|
|
Oct. 31, 2012
|
Oct. 31, 2011
|
|
| Assets: | ||
| U.S. government obligations | $ 50,057 | $ 50,264 |
| Embedded redemption feature | 420 | 7,020 |
| Reconciliation of changes in Level 3 fair value measurements | ||
| Balance at October 31, 2011 | 7,020 | |
| Issuances | 0 | |
| Settlements | 0 | |
| Changes in unrealized gain | (6,600) | |
| Transfers into Level 3 | 0 | |
| Transfers out of Level 3 | 0 | |
| Balance at October 31, 2012 | 420 | |
|
Embedded redemption feature [Member]
|
||
| Assets: | ||
| Embedded redemption feature | 400 | |
|
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
|
||
| Assets: | ||
| Total assets measured at fair value | 50,057 | 50,264 |
|
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | U.S. government obligations [Member]
|
||
| Assets: | ||
| U.S. government obligations | 50,057 | 50,264 |
|
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Embedded redemption feature [Member]
|
||
| Assets: | ||
| Embedded redemption feature | 0 | 0 |
|
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
|
||
| Assets: | ||
| Total assets measured at fair value | 0 | 0 |
|
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | U.S. government obligations [Member]
|
||
| Assets: | ||
| U.S. government obligations | 0 | 0 |
|
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Embedded redemption feature [Member]
|
||
| Assets: | ||
| Embedded redemption feature | 0 | 0 |
|
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
|
||
| Assets: | ||
| Total assets measured at fair value | 420 | 7,020 |
|
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | U.S. government obligations [Member]
|
||
| Assets: | ||
| U.S. government obligations | 0 | 0 |
|
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Embedded redemption feature [Member]
|
||
| Assets: | ||
| Embedded redemption feature | 420 | 7,020 |
|
Fair Value, Measurements, Recurring [Member] | Total [Member]
|
||
| Assets: | ||
| Total assets measured at fair value | 50,477 | 57,284 |
|
Fair Value, Measurements, Recurring [Member] | Total [Member] | U.S. government obligations [Member]
|
||
| Assets: | ||
| U.S. government obligations | 50,057 | 50,264 |
|
Fair Value, Measurements, Recurring [Member] | Total [Member] | Embedded redemption feature [Member]
|
||
| Assets: | ||
| Embedded redemption feature | $ 420 | $ 7,020 |