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Summary of Significant Accounting Policies (Tables)
 9 Months Ended
Sep. 30, 2020
Accounting Policies [Abstract]  
Schedule of Estimated Stock-Based Compensation Expense

Stock-based compensation expense, net of estimated forfeitures, is reflected in the condensed consolidated statements of operations as follows (in thousands):

 

 

Three Months Ended

 

 

Nine Months Ended

 

 

September 30,

 

 

September 30,

 

 

2020

 

 

2019

 

 

2020

 

 

2019

 

Operating Expenses

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Research and development

$

122

 

 

$

120

 

 

$

378

 

 

$

318

 

General and administrative

 

254

 

 

 

680

 

 

 

1,203

 

 

 

2,471

 

Total

$

376

 

 

$

800

 

 

$

1,581

 

 

$

2,789