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Selected Quarterly Financial Data (Unaudited)
 12 Months Ended
Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]  
Selected Quarterly Financial Data (Unaudited) Selected Quarterly Financial Data (Unaudited)
The following is a summary of our quarterly results for the years ended December 31, 2019 and 2018 (in thousands, except for per share data):
 
Quarter
 
Year Ended December 31, 2019
2019
First
 
Second
 
Third
 
Fourth
 
Operating loss
$
(24,772
)
 
$
(26,657
)
 
$
(33,745
)
 
$
(22,258
)
 
$
(107,432
)
Net loss
$
(22,078
)
 
$
(23,962
)
 
$
(31,033
)
 
$
(20,263
)
 
$
(97,336
)
Per common share:
 
 
 
 
 
 
 
 
 
Loss per share, basic
$
(0.82
)
 
$
(0.89
)
 
$
(1.15
)
 
$
(0.75
)
 
$
(3.60
)
Loss per share, diluted
$
(0.82
)
 
$
(0.89
)
 
$
(1.15
)
 
$
(0.75
)
 
$
(3.60
)
 
 
 
 
 
 
 
 
 
 
 
Quarter
 
Year Ended December 31, 2018
2018
First
 
Second
 
Third
 
Fourth
 
Operating loss
$
(15,757
)
 
$
(14,415
)
 
$
(16,887
)
 
$
(19,663
)
 
$
(66,722
)
Net loss
$
(15,086
)
 
$
(13,618
)
 
$
(15,958
)
 
$
(16,994
)
 
$
(61,656
)
Per common share:
 
 
 
 
 
 
 
 
 
Loss per share, basic
$
(0.63
)
 
$
(0.57
)
 
$
(0.66
)
 
$
(0.64
)
 
$
(2.50
)
Loss per share, diluted
$
(0.63
)
 
$
(0.57
)
 
$
(0.66
)
 
$
(0.64
)
 
$
(2.50
)