Earnings per Share

3 Months Ended

Apr. 30, 2012

Earnings Per Share [Abstract]

Earnings per Share

10. Earnings per Share

Net income per basic common share is computed using the weighted average number of common shares outstanding during the period, excluding unvested restricted stock. Net income per diluted common share is computed using the weighted average number of common shares and dilutive potential common shares outstanding during the period using the treasury stock method. Potential common shares result from the assumed exercise of outstanding common stock options having a dilutive effect and from the assumed vesting of unvested shares of restricted stock.

The following table presents the calculation of basic and diluted weighted average common shares used in the earnings per share calculation:

	Three Months Ended April 30,
	2012		2011
	(in thousands)
Basic weighted average common shares outstanding		12,626		9,923
Stock options		676		527
Unvested restricted stock		24		20
Total weighted average common share equivalents		700		547
Diluted weighted average common shares outstanding		13,326		10,470