Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity

The following table summarizes stock option activity during the six months ended June 30, 2019:

	2017 Plan			2019 Inducement Plan		Total Number of Stock Options
Outstanding as of December 31, 2018		2,297,810			—		2,297,810
Granted		860,434			72,300		932,734
Exercised		(53,368	)		—		(53,368	)
Forfeited		(78,695	)		—		(78,695	)
Outstanding as of June 30, 2019		3,026,181			72,300		3,098,481

Summary of Share-Based Compensation Expense

The Company recorded share-based compensation expense in the following expense categories of its consolidated statements of operations and comprehensive loss (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Research and development expenses	$	385	$	287	$	755	$	537
General and administrative expenses		548		374		1,111		738
Total	$	933	$	661	$	1,866	$	1,275