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Note 3. Fair Value Measurements - Fair Value Assets Measured on Recurring Basis (Details) (USD $)
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Oct. 31, 2012
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Jul. 31, 2012
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|---|---|---|
| Cash and Cash Equivalents | ||
|
Level 1 Member
|
||
| Cash and Cash Equivalents | ||
|
Level 2 Member
|
||
| Cash and Cash Equivalents | ||
|
Level 3 Member
|
||
| Cash and Cash Equivalents |

