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Net (Loss) Income per Share - Outstanding Options and Warrants Excluded from Computation of Diluted Net (Loss) Income per Share (Detail)	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Earnings Per Share [Abstract]
Options, awards and warrants	2,401,649	630,909	574,789

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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