Note 9 - Fair Value Measurements (Details) - Changes in Fair Value of Level 3 Financial Instruments (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2014	Apr. 30, 2013
Note 9 - Fair Value Measurements (Details) - Changes in Fair Value of Level 3 Financial Instruments [Line Items]
Beginning Balance	$ 2,520	$ 2,466
Change in estimated fair value recognized in results of operations	1,005	767
Recorded New Derivative Liabilities		624
Ending Balance	3,525	3,857
Warrant [Member] \| Broadwood Partners, L.P. [Member]
Note 9 - Fair Value Measurements (Details) - Changes in Fair Value of Level 3 Financial Instruments [Line Items]
Beginning Balance	2,426
Change in estimated fair value recognized in results of operations	799
Ending Balance	3,225
Conversion Features [Member] \| Elkhorn Partners Limited Partnership [Member]
Note 9 - Fair Value Measurements (Details) - Changes in Fair Value of Level 3 Financial Instruments [Line Items]
Beginning Balance	94
Change in estimated fair value recognized in results of operations	206
Recorded New Derivative Liabilities	0
Ending Balance	$ 300

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.

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