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 October 31,		Nine Months Ended October 31,
	2019	2018	2019	2018
	(in thousands)		(in thousands)
Basic weighted average common shares outstanding	12,158	12,119	12,135	12,100
Stock options	44	92	80	73
Unvested restricted stock	2	3	2	10
Total weighted average common share equivalents	46	95	82	83
Diluted weighted average common shares outstanding	12,204	12,214	12,217	12,183

For the three and nine months ended October 31, 2019 and 2018, potentially dilutive common shares, underlying stock options and unvested restricted stock were anti-dilutive and were therefore not considered in calculating diluted loss per share for those periods.