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Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Summary of Stock-Based Compensation Expense Related to Company's Stock-Based Awards

The following table summarizes stock-based compensation expense related to the Company’s stock-based awards for the periods indicated (in thousands):

 

 

Three months ended

June 30,

 

 

Six months ended

June 30,

 

 

2020

 

 

2019

 

 

2020

 

 

2019

 

Research and development

$

136

 

 

$

140

 

 

$

248

 

 

$

296

 

General and administrative

 

157

 

 

 

198

 

 

 

350

 

 

 

414

 

Employee stock-based compensation expense

 

293

 

 

 

338

 

 

 

598

 

 

 

710

 

Non-employee stock-based compensation expense

 

94

 

 

 

56

 

 

 

108

 

 

 

101

 

Total stock-based compensation expense

$

387

 

 

$

394

 

 

$

706

 

 

$

811