Earnings per Share

6 Months Ended

Jun. 30, 2011

Earnings Per Share [Abstract]

Earnings per Share

3. Earnings per Share

     Net income is calculated in accordance with FASB guidance on earnings per share. Basic earnings per share (EPS) is calculated by dividing the net income by the weighted average number of shares of common stock outstanding, reduced by the weighted average unvested shares of common stock subject to repurchase. Diluted EPS is computed by dividing the net income (loss) by the weighted average number of other potential common stock outstanding for the period. Other potential common stock includes stock options and RSUs, but only to the extent that their inclusion is dilutive.

     The following schedule presents the calculation of basic and diluted net income (loss) per share of common stock for the three and six months ended June 30, 2011 and 2010:

	Three Months Ended					Six Months Ended
	June 30,			June 30,		June 30,			June 30,
	2011			2010		2011			2010
Numerator:
Net income (loss)	$	(1,341	)	$	1,280	$	(1,205	)	$	1,809
Denominator:
Weighted average shares of common stock outstanding, basic		28,103,441			27,896,889		28,102,774			27,802,298
Stock options and restricted stock units related to the issuance of common stock		—			541,229		—			580,844
Weighted average shares of common stock outstanding, diluted		28,103,441			28,438,118		28,102,774			28,383,142
Net income (loss) per share:
Basic	$	(0.05	)	$	0.05	$	(0.04	)	$	0.07
Diluted	$	(0.05	)	$	0.04	$	(0.04	)	$	0.06
Anti-dilutive securities not included in diluted net income (loss) per share calculation:
Options to purchase common stock and restricted stock units		3,974,965			2,638,115		3,560,885			2,597,858