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Quarterly Financial Information (Tables)
 12 Months Ended
Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]  
Quarterly Information
The Company’s unaudited quarterly information for the years ended December 31, 2018 and 2017 is as follows:
 
 
 
Quarter Ended
 
 
 
March 31
 
 
June 30
 
 
September 30
 
 
December 31
 
 
 
(in thousands, except per share data)
 
2018:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Revenue
 
$
9,653
 
 
$
10,773
 
 
$
7,735
 
 
$
6,127
 
Net loss
 
$
(46,352
)
 
$
(44,492
)
 
$
(44,570
)
 
$
(49,334
)
Net loss per share
 
$
(0.14
)
 
$
(0.12
)
 
$
(0.12
)
 
$
(0.13
)
 
 
 
Quarter Ended
 
 
 
March 31
 
 
June 30
 
 
September 30
 
 
December 31
 
 
 
(in thousands, except per share data)
 
2017:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Revenue
 
$
5,680
 
 
$
6,732
 
 
$
8,352
 
 
$
10,412
 
Net loss
 
$
(43,854
)
 
$
(44,465
)
 
$
(44,607
)
 
$
(50,843
)
Net loss per share
 
$
(0.16
)
 
$
(0.16
)
 
$
(0.15
)
 
$
(0.16
)