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Note 9 - Fair Value Measurements (Detail) - Changes in Fair Value of Level 3 Financial Instruments (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | |
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Apr. 30, 2013
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Jan. 31, 2013
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| Derivative liabilities | $ 3,857 | $ 2,466 |
| Derivative liabilities | 767 | |
| Derivative liabilities | $ 624 |
| X | ||||||||||
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- Definition
No authoritative reference available. No definition available.
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| X | ||||||||||
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- Definition
No authoritative reference available. No definition available.
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| X | ||||||||||
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- Definition
Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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