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Retirement plans 401K (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Jan. 31, 2013 | Jan. 31, 2012
401K [Abstract] |  |
401K employee pretax payroll contributions limit | 16.00% |
Company matches contribution | 50.00% |
maximum % of each participant's salary | 3.00% |
Employer contributions to 401K | $ 560 | $ 558

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- Details
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- Definition 401K employee pretax payroll contributions limit + References No definition available. + Details
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- Definition Company matches contribution + References No definition available. + Details
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- Definition Employer contributions to 401K + References No definition available. + Details
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- Definition maximum % of each participant's salary + References No definition available. + Details
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