Note 10 - Stock Compensation (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	2,675,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	764,500	380,000	1,022,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	465,000	0
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized (in Dollars)	$ 0.1
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	9 months 3 days
Share Price (in Dollars per share)	$ 0.16
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	212,100
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in Dollars per share)	$ 4.00
Common Stock, Capital Shares Reserved for Future Issuance	455,224
Employee Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	825,000
Share Based Compensation Options Maximum Expiration Period Following Grant Date	10 years
Share Based Compensation Options Maximum Expiration Period Following Grant Date for Specified Percentage Ownership	5 years
2005 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	450,000
Share Based Compensation Arrangement By Share Based Payment Award Number of Shares Authorized Including Additional Shares Authorized	1,100,000
Share Based Compensation Options Maximum Expiration Period Following Grant Date	10 years
Share Based Compensation Options Maximum Expiration Period Following Grant Date for Specified Percentage Ownership	5 years
2011 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	750,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	300,000	325,000
Share Based Awards Fair Value Estimation Grant Date Stock Price (in Dollars per share)		0.31
Prior Employee Plan (Member)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	25,000

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Aggregate number of common shares reserved for future issuance.

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As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Gross number of share options (or share units) granted during the period.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Price of a single share of a number of saleable stocks of a company.

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