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QUARTERLY FINANCIAL DATA
 12 Months Ended
Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]  
Quarterly Financial Data
Selected Quarterly Financial Data (Unaudited)
    
The following is a summary of the quarterly results of the Company for the years ended December 31, 2018 and 2017 (unaudited, in thousands, except for per share data):
 
Three Months Ended
 
Year Ended
 
3/31/18
 
6/30/18
 
9/30/18
 
12/31/18
 
December 31, 2018
License and collaboration revenues
$
9,467

 
$
—

 
$
—

 
$
3,459

 
$
12,926

Loss from operations
(15,346
)
  
(28,670
)
  
(28,939
)
  
(29,672
)
  
$
(102,627
)
Net loss
(14,709
)
 
(27,869
)
 
(27,568
)
 
(28,272
)
 
(98,418
)
Basic and diluted net loss per share
$
(0.51
)
 
$
(0.94
)
 
$
(0.85
)
 
$
(0.87
)
 
$
(3.19
)
 

Three Months Ended
 
Year Ended
 
3/31/17
 
6/30/17
 
9/30/17
 
12/31/17
 
December 31, 2017
Loss from operations
$
(18,090
)
  
$
(18,616
)
  
$
(16,601
)
  
$
(18,228
)
  
$
(71,535
)
Net loss
(17,846
)
 
(18,339
)
 
(16,350
)
 
(17,895
)
 
(70,430
)
Basic and diluted net loss per share
$
(0.73
)
 
$
(0.74
)
 
$
(0.65
)
 
$
(0.67
)
 
$
(2.78
)


Net loss per share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly per-share calculations will not necessarily equal the annual per share calculation.