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Note 8 - Fair Value Measurements (Details) - Changes in Fair Value of Level 3 Financial Instruments (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |
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Jan. 31, 2014
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Jan. 31, 2013
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| Note 8 - Fair Value Measurements (Details) - Changes in Fair Value of Level 3 Financial Instruments [Line Items] | ||
| Balance | $ 2,520 | $ 2,466 |
| Change in estimated fair value recognized in results of operations | (570) | |
| Recorded New Derivative Liabilities | 624 | |
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Broadwood Warrants1 [Member]
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| Note 8 - Fair Value Measurements (Details) - Changes in Fair Value of Level 3 Financial Instruments [Line Items] | ||
| Balance | 2,426 | 2,466 |
| Change in estimated fair value recognized in results of operations | (40) | |
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Elkhorn Conversion Features [Member]
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| Note 8 - Fair Value Measurements (Details) - Changes in Fair Value of Level 3 Financial Instruments [Line Items] | ||
| Balance | 94 | 0 |
| Change in estimated fair value recognized in results of operations | (530) | |
| Recorded New Derivative Liabilities | $ 624 |