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Selected Quarterly Financial Data
 12 Months Ended
Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]  
Selected Quarterly Financial Data

18.

Selected Quarterly Financial Data (Unaudited; in thousands, except per share amounts)

 

 

 

Year Ended December 31, 2017

 

 

 

Q1

 

 

Q2

 

 

Q3

 

 

Q4

 

Revenues

 

$

148

 

 

$

105

 

 

$

53

 

 

$

21

 

Net loss

 

$

(25,287

)

 

$

(20,318

)

 

$

(22,128

)

 

$

(27,421

)

Basic and diluted net loss per share

 

$

(0.60

)

 

$

(0.41

)

 

$

(0.38

)

 

$

(0.45

)

Shares used to compute basic and diluted net loss per share

 

 

41,830

 

 

 

49,700

 

 

 

57,650

 

 

 

61,007

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Year Ended December 31, 2016

 

 

 

Q1

 

 

Q2

 

 

Q3

 

 

Q4

 

Revenues

 

$

942

 

 

$

2,647

 

 

$

162

 

 

$

7,292

 

Net loss

 

$

(27,023

)

 

$

(28,986

)

 

$

(34,694

)

 

$

(21,741

)

Basic and diluted net loss per share

 

$

(0.70

)

 

$

(0.75

)

 

$

(0.90

)

 

$

(0.56

)

Shares used to compute basic and diluted net loss per share

 

 

38,472

 

 

 

38,496

 

 

 

38,512

 

 

 

38,544