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Note 15 - Description of Beneficial Interests (Details Textual) (USD $) | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2010 | Sep. 15, 2009 | Jan. 05, 2009 | Sep. 10, 2007 | Jan. 02, 2001
Stock Repurchase Program, Number of Shares Authorized to be Repurchased |  |  | 350,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased | 250,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased | 300,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased | 350,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased | 250,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Stock Repurchased During Period, Shares | 99,897 us-gaap_StockRepurchasedDuringPeriodShares | 51,308 us-gaap_StockRepurchasedDuringPeriodShares |  |  |  |  |
Treasury Stock Acquired, Average Cost Per Share | $ 2.20 us-gaap_TreasuryStockAcquiredAverageCostPerShare | $ 1.86 us-gaap_TreasuryStockAcquiredAverageCostPerShare |  |  |  |  |
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased | 127,919 us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased |  |  |  |  |  |

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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_StockRepurchasedDuringPeriodShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
Name: | us-gaap_TreasuryStockAcquiredAverageCostPerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration