Earnings Per Share

6 Months Ended

Jun. 30, 2015

Basic earnings per share is calculated by dividing net income (loss) for the period by the weighted average number of common shares outstanding during the period. Diluted earnings per share is computed by dividing net income (loss) for the period by the weighted average number of shares of common stock outstanding during the period and including the dilutive effect of common stock that would be issued assuming conversion or exercise of outstanding warrants, stock options, share based compensation awards and other dilutive securities.

The following is a reconciliation of weighted-average shares outstanding used in the calculation of basic and diluted earnings from continuing operations per share for the three and six months ended June 30, 2014 and 2015 (in thousands, except per share data):



	Three Months Ended					Six Months Ended
	June 30,					June 30,
	2014			2015		2014			2015
Net income (loss)	$	(78	)	$	685	$	(490	)	$	4,556
Basic weighted-average common shares outstanding	60,159			61,292		59,920			61,027
Assumed exercise of dilutive stock options, warrants and restricted stock	—			5,270		—			4,584
Diluted weighted-average common shares outstanding	60,159			66,562		59,920			65,611
Net income (loss):
Basic income (loss) per share	$	(0.00	)	$	0.01	$	(0.01	)	$	0.07
Diluted income (loss) per share	$	(0.00	)	$	0.01	$	(0.01	)	$	0.07

Outstanding equity awards not included in the calculation of diluted net income (loss) per share because their effect was anti-dilutive were as follows:



	Three Months Ended
	June 30,
	2014			2015
	Number of Potential Shares	Range of Exercise Prices		Number of Potential Shares	Range of Exercise Prices
Stock options	10,573,585	$0.47 - $7.84		2,384,500	$4.75 - $7.04
Unvested stock awards	34,845	$	—	—	$	—
Warrants	1,602,489	$	2.40	—	$	—



	Six Months Ended
	June 30,
	2014			2015
	Number of Potential Shares	Range of Exercise Prices		Number of Potential Shares	Range of Exercise Prices
Stock options	10,573,585	$0.47 - $7.84		3,969,113	$4.00-$7.04
Unvested stock awards	34,845	$	—	—	$	—
Warrants	1,602,489	$	2.40	—	$	—

Shares issued

Common stock activity during the period is as follows (in thousands):



	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2014		2015		2014		2015
Shares issued:
Options exercised	273		938		905		1,000
Restricted stock awards granted	30		50		30		333
Shares purchased under stock plan	68		143		266		143
Share decreases:
Shares repurchased for tax purposes	(2	)	(1	)	(17	)	(2	)