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Net Loss per Share Attributable to Common Stockholders (Tables)
 9 Months Ended
Sep. 30, 2018
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table sets forth the computation of the Company's net loss per share (basic) and net loss per share (diluted) attributable to common stockholders (in thousands, except per share amounts):
 
 
 
 
 
 
 
 
 
 
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
 
2018
 
2017
 
2018
 
2017
 
 
 
 
 
 
 
Numerator:
 
 
 
 
 
 
 
 
Net loss attributable to common stockholders
 
$
(78,579
)
 
$
(71,831
)
 
$
(141,972
)
 
$
(194,838
)
Less: noncumulative dividends to preferred stockholders
 
—

 
—

 
—

 
—

Less: undistributed earnings to participating securities
 
—

 
—

 
—

 
—

Net loss attributable to common stockholders (basic)
 
(78,579
)
 
(71,831
)
 
(141,972
)
 
(194,838
)
Add: adjustments to undistributed earnings to participating securities
 
—

 
—

 
—

 
—

Net loss attributable to common stockholders (diluted)
 
$
(78,579
)
 
$
(71,831
)
 
$
(141,972
)
 
$
(194,838
)
Denominator:
 
 
 
 
 
 
 
 
Weighted average shares of common stock (basic)
 
81,321

 
10,305

 
34,347

 
10,220

Effect of potentially dilutive stock options
 
—

 
—

 
—

 
—

Weighted average shares of common stock (diluted)
 
81,321

 
10,305

 
34,347

 
10,220

Net loss per share attributable to common stockholders:
 
 
 
 
 
 
 
 
Basic and diluted
 
$
(0.97
)
 
$
(6.97
)
 
$
(4.13
)
 
$
(19.06
)
Schedule of Antidilutive Securities Excluded from Computation of Diluted Net Loss Per Share
The following common stock equivalents (in thousands) were excluded from the computation of net loss per share attributable to common shareholders (diluted) for the periods presented as their inclusion would have been antidilutive:
 
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
 
2018
 
2017
 
2018
 
2017
 
 
 
 
 
 
 
 
 
Convertible and non-convertible redeemable preferred stock and convertible notes
 
24,512

 
85,241

 
27,219

 
85,241

Stock options to purchase common stock
 
3,454

 
2,905

 
3,454

 
2,762

Convertible redeemable preferred stock warrants
 
—

 
60

 
—

 
60

Convertible redeemable common stock warrants
 
89

 
313

 
89

 
312

 
 
28,055

 
88,519

 
30,762

 
88,375