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Net Loss per Share (Tables)
12 Months Ended
Dec. 31, 2019
Net Loss per Share  
Basic and diluted net loss per common share

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Year ended December 31, 

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(in thousands, except per share data)

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2019

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2018

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2017

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Numerator:

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Net loss used to compute net loss per share, basic

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$

(124,827)

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$

(128,154)

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$

(137,628)

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Less: Remeasurement gain on warrant liability

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—

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—

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(1,148)

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Net loss used to compute net loss per share, diluted

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$

(124,827)

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$

(128,154)

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$

(138,776)

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Denominator:

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Weighted-average common shares outstanding

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69,555

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57,848

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53,312

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Less: Weighted-average unvested common shares subject to repurchase

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—

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—

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—

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Weighted-average number of shares used in computing net loss per share, basic

 

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69,555

 

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57,848

 

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53,312

 

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Add: Incremental shares from assumed exercise of warrants

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—

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—

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292

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Weighted-average number of shares used in computing net loss per share, diluted

 

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69,555

 

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57,848

 

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53,604

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Net loss per share, basic

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$

(1.79)

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$

(2.22)

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$

(2.58)

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Net loss per share, diluted

 

$

(1.79)

 

$

(2.22)

 

$

(2.59)

 

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Total outstanding potentially dilutive shares not included in the calculation of dilutive EPS

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As of December 31,

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2019

    

2018

    

2017

 

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Options to purchase common stock

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8,497

 

9,463

 

9,963

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Restricted stock units

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2,404

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1,084

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389

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Employee stock purchase plan

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32

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42

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79

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10,933

 

10,589

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10,431

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