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Net Loss Per Share
 6 Months Ended
Jun. 30, 2014
Earnings Per Share [Abstract]  
Net Loss Per Share
Net Loss Per Share
Basic earnings per share (“EPS”) is calculated by dividing the net income or loss available to common stockholders by the weighted average number of common shares outstanding for the period, without consideration for common stock equivalents. Diluted EPS is computed by dividing the net income available to common stockholders by the weighted average number of common shares outstanding for the period and the weighted average number of dilutive common stock equivalents outstanding for the period determined using the treasury-stock method. For purposes of this calculation, common stock subject to repurchase by the Company and options are considered to be common stock equivalents and are only included in the calculation of diluted earnings per share when their effect is dilutive (in thousands, except per share data):
 
 
Three Months Ended 
 June 30,
 
Six Months Ended 
 June 30,
 
2014
 
2013
 
2014
 
2013
Numerator:
 
 
 
 
 
 
 
Net loss
$
(2,895
)
 
$
(4,661
)
 
$
(9,568
)
 
$
(7,310
)
Denominator:
 
 
 
 
 
 
 
Weighted average common shares outstanding
97,832

 
96,795

 
97,730

 
96,748

Weighted average unvested common shares subject to repurchase
(910
)
 
(869
)
 
(870
)
 
(872
)
Weighted average common shares outstanding—basic
96,922

 
95,926

 
96,860

 
95,876

Effect of dilutive securities:
 
 
 
 
 
 
 
Options, warrants and restricted share awards
—

 
—

 
—

 
—

Weighted average common shares outstanding—diluted
96,922

 
95,926

 
96,860

 
95,876

Net loss per common share:
 
 
 
 
 
 
 
Basic and diluted net loss per share
$
(0.03
)
 
$
(0.05
)
 
$
(0.10
)
 
$
(0.08
)

The weighted-average anti-dilutive securities not included in diluted net loss per share were as follows (in thousands):
 
 
Three Months Ended 
 June 30,
 
Six Months Ended 
 June 30,
 
2014
 
2013
 
2014
 
2013
Options to purchase common stock
7,270

 
4,098

 
7,320

 
4,099

Unvested restricted share awards
910

 
869

 
870

 
872

Warrants to purchase common stock
10,844

 
594

 
10,844

 
594

Total
19,024

 
5,561

 
19,034

 
5,565