Equity Incentive Plans (Tables)

6 Months Ended

Jun. 30, 2020

Equity Incentive Plans

Summary of Weighted-Average Assumptions to Estimate Fair Value of Employee Stock Options

	Six Months Ended June 30,
	2020
Expected term (years)	6.00
Expected volatility	83.55	%
Risk-free interest rate	1.33	%
Dividend yield	—	%

Summary of Stock-Based Compensation Expense Recognized

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Research and development	$	1,144	$	767	$	2,202	$	1,527
General and administrative		1,530		1,156		3,420		2,318
Total	$	2,674	$	1,923	$	5,622	$	3,845

Summary of Total Unrecognized Stock-Based Compensation Expense, Net of Estimated Forfeitures

	Unrecognized Compensation Expense		Average Remaining Vesting Period (Years)
Stock options	$	15,202	2.8
PRSUs	$	396	0.2
ESPP	$	78	0.2