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Shareholders' Equity (Details)	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
Summarized Shares of common stock
Balance at beginning of year	8,956,488	8,660,270
Exercise of employee stock options	66,313	289,417
Shares issued to employee stock purchase plan	5,976	6,801
Share-based compensation	2,979	139,895
Balance at end of year	9,031,756	8,956,488

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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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