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Net Loss Per Share (Tables)
 9 Months Ended
Sep. 30, 2015
Earnings Per Share [Abstract]  
Summary of Computation of Basic and Diluted Net Income (Loss) Per Share
The following table summarizes the computation of basic and diluted net loss per share attributable to the Company’s common stockholders:
 
Three Months Ended 
 September 30,
 
Nine Months Ended 
 September 30,
 
2015
 
2014
 
2015
 
2014
Income (loss) attributable to common stock - basic:
 
 
 
 
 
 
 
Loss from continuing operations
$
(7,529
)
 
$
(4,200
)
 
$
(19,950
)
 
$
(2,225
)
Deemed dividend for beneficial conversion feature on Series D-2 Preferred
—

 
—

 
—

 
(909
)
Deemed dividend for antidilution adjustments to convertible preferred stock
—

 
—

 
—

 
(214
)
Accretion of convertible preferred stock
—

 
—

 
—

 
(510
)
Allocation of net income to convertible preferred stockholders
—

 
—

 
—

 
—

Loss from continuing operations attributable to common stock - basic
(7,529
)
 
(4,200
)
 
(19,950
)
 
(3,858
)
Income (loss) from discontinued operations, net of income tax expense, attributable to common stock - basic
(826
)
 
396

 
(4,285
)
 
1,066

Net loss attributable to common stock - basic
$
(8,355
)
 
$
(3,804
)
 
$
(24,235
)
 
$
(2,792
)
 
 
 
 
 
 
 
 
Income (loss) attributable to common stock - diluted:
 
 
 
 
 
 
 
Loss from continuing operations attributable to common stock - basic
$
(7,529
)
 
$
(4,200
)
 
$
(19,950
)
 
$
(3,858
)
Derivative fair value adjustment
—

 
—

 
—

 
(10,080
)
Loss from continuing operations attributable to common stock - diluted
(7,529
)
 
(4,200
)
 
(19,950
)
 
(13,938
)
Loss from discontinued operations, net of income tax expense, attributable to common stock - diluted
(826
)
 
396

 
(4,285
)
 
1,066

Net loss attributable to common stock - diluted
$
(8,355
)
 
$
(3,804
)
 
$
(24,235
)
 
$
(12,872
)
 
 
 
 
 
 
 
 
Weighted-average common shares outstanding:
 
 
 
 
 
 
 
Weighted-average common shares outstanding - basic
13,904,331

 
8,504,785

 
11,576,498

 
4,703,278

Allocation of common stock warrants as participating securities
—

 
—

 
—

 
273,687

Weighted-average common shares outstanding - diluted
13,904,331

 
8,504,785

 
11,576,498

 
4,976,965

 
 
 
 
 
 
 
 
Income (loss) per share - basic:
 
 
 
 
 
 
 
Continuing operations
$
(0.54
)
 
$
(0.50
)
 
$
(1.72
)
 
$
(0.82
)
Discontinued operations
(0.06
)
 
0.05

 
(0.37
)
 
0.23

Net loss per share - basic
$
(0.60
)
 
$
(0.45
)
 
$
(2.09
)
 
$
(0.59
)
Income (loss) per share - diluted:
 
 
 
 
 
 
 
Continuing operations
$
(0.54
)
 
$
(0.50
)
 
$
(1.72
)
 
$
(2.80
)
Discontinued operations
(0.06
)
 
0.05

 
(0.37
)
 
0.21

Net income (loss) per share - diluted
$
(0.60
)
 
$
(0.45
)
 
$
(2.09
)
 
$
(2.59
)
Summary of Antidilutive Securities Excluded from Computation of Weighted Average Common Stock Outstanding
The following securities, presented on a common stock equivalent basis, have been excluded from the calculation of weighted average common shares outstanding because their effect is anti-dilutive.
 
Three Months Ended 
 September 30,
 
Nine Months Ended 
 September 30,
 
2015
 
2014
 
2015
 
2014
Convertible preferred stock:
 
 
 
 
 
 
 
Series A Preferred
—

 
—

 
—

 
6,149

Series B Preferred
—

 
—

 
—

 
131,685

Series C Preferred
—

 
—

 
—

 
783,515

Series C-2 Preferred
—

 
—

 
—

 
173,213

Series D-1 Preferred
—

 
—

 
—

 
296,773

Series D-2 Preferred
—

 
—

 
—

 
300,549

Series C-1 Preferred warrants
14,033

 
14,033

 
14,033

 
14,033

Stock options
1,207,697

 
625,627

 
1,207,697

 
625,627

ESPP
—

 
59,203

 
—

 
59,203