Net Loss per Share Applicable to Common Stockholders

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Net Loss per Share Applicable to Common Stockholders

9. Net Loss per Share Applicable to Common Stockholders

Basic net loss per share applicable to common stockholders is calculated by dividing net loss applicable to common stockholders by the weighted average shares outstanding during the period, without consideration for common stock equivalents. Net loss applicable to common stockholders is calculated by adjusting the net loss of the Company for cumulative preferred stock dividends for periods when preferred stock was outstanding. Diluted net loss per share applicable to common stockholders is calculated by adjusting weighted average shares outstanding for the dilutive effect of common stock equivalents outstanding for the period, determined using the treasury-stock method. For purposes of the dilutive net loss per share applicable to common stockholders calculation, preferred stock, stock options, and unvested restricted stock are considered to be common stock equivalents but are excluded from the calculation of diluted net loss per share applicable to common stockholders, as their effect would be anti-dilutive; therefore, basic and diluted net loss per share applicable to common stockholders were the same for all periods presented. The following common stock equivalents were excluded from the calculation of diluted net loss per share applicable to common stockholders for the periods indicated because including them would have had an anti-dilutive effect:

	Three and Six Months Periods Ended June 30,
	2014		2013
Convertible preferred stock		—		19,731,564
Stock options		3,983,561		3,657,145
Unvested restricted stock		14,204		63,840
		3,997,765		23,452,549