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Note 16 - Stock-based Compensation Plans (Details) - Summary of CRSU Plan Activity - shares
 12 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Summary of CRSU Plan Activity [Abstract]    
Number of Units Outstanding 113,856 152,794
Weighted-Average Remaining Contractual Life (years) 1 year 219 days 1 year 6 months
Non-vested at January 31, 2016 100,749  
Non-vested at January 31, 2016 1 year 219 days  
Number of Units Granted 72,817 68,439
Number of Units Vested and Settled in Cash (85,924) (106,910)
Forfeited   (467)
Number of Units Outstanding 100,749 113,856