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SUPPLEMENTARY FINANCIAL INFORMATION (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]  
Selected Financial Information
The following tables set forth selected financial information for the quarterly periods noted (in thousands, except per share data):
 
2019
 
First Quarter
 
Second Quarter
 
Third Quarter
 
Fourth Quarter
Total revenue
$
—

 
$
—

 
$
—

 
$
—

Total operating expenses
$
6,741

 
$
54,561

 
$
13,451

 
$
33,738

Loss from operations
$
(6,741
)
 
$
(54,561
)
 
$
(13,451
)
 
$
(33,738
)
Net loss and comprehensive loss
$
(6,480
)
 
$
(54,335
)
 
$
(13,132
)
 
$
(33,553
)
Net loss per common share - basic and diluted
$
(0.08
)
 
$
(0.67
)
 
$
(0.13
)
 
$
(0.32
)
 
2018
 
First Quarter
 
Second Quarter
 
Third Quarter
 
Fourth Quarter
Total revenue
$
—

 
$
—

 
$
—

 
$
—

Total operating expenses
$
4,007

 
$
9,030

 
$
14,397

 
$
7,066

Loss from operations
$
(4,007
)
 
$
(9,030
)
 
$
(14,397
)
 
$
(7,066
)
Net loss and comprehensive loss
$
(3,963
)
 
$
(8,958
)
 
$
(14,015
)
 
$
(6,757
)
Net loss per common share - basic and diluted
$
(0.11
)
 
$
(0.16
)
 
$
(0.18
)
 
$
(0.09
)

Quarterly computations of net loss per common share amounts are made independently for each quarterly reporting period, and the sum of the per share amounts for the quarterly reporting periods may not equal the per share amounts for the year-to-date reporting period.