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Stock rights Narrative (Details) (USD $) | 12 Months Ended
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Jan. 31, 2013
Stock rights [Abstract] |
Price of MFRI common stock with Right | $ 0
days to wait after a person or group acquires 15% of common stock | $ 10
Change in control percentage | 15.00%
redemption price per Right | $ 0.01
expiration date of Right | Sep. 15, 2019

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- Definition Change in control percentage + References No definition available. + Details
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- Definition days to wait after a person or group acquires 15% of common stock + References No definition available. + Details
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- Definition expiration date of Right + References No definition available. + Details
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Period Type: | duration

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- Definition Price of MFRI common stock with Right + References No definition available. + Details
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- Definition redemption price per Right + References No definition available. + Details
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Period Type: | duration

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- Details
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