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Shareholders' Equity - Summary of Number of Shares Issued of Common Stock (Detail)	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Equity [Abstract]
Balance at beginning of year	9,031,756	8,956,488
Exercise of employee stock options	210,790	66,313
Restricted stock vesting	42,325
Shares issued to employee stock purchase plan	3,989	5,976
Share-based compensation	2,365	2,979
Balance at end of year	9,291,225	9,031,756

X

- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

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Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Number of share options (or share units) exercised during the current period.

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