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Selected Quarterly Financial Data (Unaudited)
 12 Months Ended
Dec. 31, 2020
Selected Quarterly Financial Information [Abstract]  
Selected Quarterly Financial Data (Unaudited)

15.  Selected Quarterly Financial Data (Unaudited)

Selected quarterly results from operations for the years ended December 31, 2020 and 2019 are as follows (in thousands, except per share amounts):

 

 

 

2020 Quarter Ended

 

 

 

March 31,

 

 

June 30,

 

 

September 30,

 

 

December 31,

 

Loss from operations

 

$

(19,022

)

 

$

(21,560

)

 

$

(18,123

)

 

$

(22,776

)

Net loss

 

 

(18,728

)

 

 

(21,418

)

 

 

(18,033

)

 

 

(22,714

)

Basic and diluted net loss per common share

 

$

(0.57

)

 

$

(0.40

)

 

$

(0.29

)

 

$

(0.35

)

 

 

 

2019 Quarter Ended

 

 

 

March 31,

 

 

June 30,

 

 

September 30,

 

 

December 31,

 

Loss from operations

 

$

(17,657

)

 

$

(18,622

)

 

$

(22,146

)

 

$

(21,909

)

Net loss

 

 

(17,167

)

 

 

(18,019

)

 

 

(21,573

)

 

 

(21,495

)

Basic and diluted net loss per common share

 

$

(0.59

)

 

$

(0.55

)

 

$

(0.66

)

 

$

(0.65

)