(2) Loss Per Share

The Company calculates basic loss per share by dividing loss attributable to common stockholders by the weighted average common shares outstanding during the period, excluding common stock subject to vesting provisions. Diluted loss per share is computed by dividing loss attributable to common stockholders by the weighted average number of common shares outstanding during the period increased to include, if dilutive, the number of additional common shares that would have been outstanding if the potential common shares had been issued. The Company’s potentially dilutive shares include options and warrants.

A reconciliation of the numerator and denominator used in the calculation of basic and diluted loss per share follows:

	Three Months Ended March 31,
	2013	2012
(In thousands, except shares and per share data)
Net loss	$ (1,071)	$ (1,407)
Net loss available to common shareholders	$ (1,071)	$ (1,407)

Weighted average shares of common stock outstanding	3,037,546	2,030,499
Less: Weighted-average shares of unvested common stock	(2,783)	(2,783)
Total weighted-average shares used in computing net loss per share attributed to common stockholders
	3,034,763	2,027,716
Basic and diluted loss per share	$ (0.35)	$ (0.69)

Potentially dilutive securities representing 1.3 million and 604,000 weighted average shares of common stock were excluded for the three months ended March 31, 2013 and 2012, respectively, because including them would have an anti-dilutive effect on net loss per share.