Note 9 - Fair Value Measurements - Changes in Fair Value of Level 3 Financial Instruments (Details) (Fair Value, Inputs, Level 3 [Member], USD $) In Thousands, unless otherwise specified	9 Months Ended
	Oct. 31, 2014
Broadwood warrants	$ 2,520us-gaap_DerivativeLiabilities
Broadwood warrants	(226)
Broadwood warrants	(2,294)
Warrant [Member] \| Broadwood Partners, L.P. [Member]
Broadwood warrants	2,426
Broadwood warrants	(132)
Broadwood warrants	(2,294)
Conversion Feature [Member] \| Elkhorn Partners Limited Partnership [Member]
Broadwood warrants	94
Broadwood warrants	$ (94)

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 liabilities not subject to a master netting arrangement and not elected to be offset.

+ References+ Details