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Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity

Stock option activity under the 2019 Equity Incentive Plan (the “2019 Plan”) is set forth below for the nine months ended September 30, 2021:

						Weighted				Average
						Average				Remaining				Aggregate
		Number of				Exercise				Contractual				Intrinsic
		Shares				Price Per				Term				Value
		Outstanding				Share				(Years)				(in thousands)
Balances at December 31, 2020			1,481,100			$	16.13				8.36			$	11,123
Stock options authorized			—
Stock options granted			726,195				20.56
Stock options exercised			(104,104	)			10.19
Stock options forfeited			(120,893	)			21.07
Balances at September 30, 2021			1,982,298			$	17.77			8.22				$	28,364

Summary of RSU Activity

Restricted stock unit (“RSU”) activity under the 2019 Plan is set forth below for the nine months ended September 30, 2021:

						Weighted
						Average
		Number of				Grant Date
		Shares				Fair Value
		Outstanding				Per Share
Balances at December 31, 2020			56,500			$	44.66
RSUs granted			—				—
RSUs vested and settled			(14,125	)			44.66
RSUs forfeited			(1,875	)			44.66
Balances at September 30, 2021			40,500			$	44.66

Summary of Stock-based Compensation Expense

Total stock-based compensation expense recognized for options and RSUs granted to both employees and non-employees and for the employee stock purchase plan was as follows (in thousands):

		For the Three Months Ended September 30,								For the Nine Months Ended September 30,
		2021				2020				2021				2020
Research and development		$	1,207			$	1,125			$	4,308			$	3,450
General and administrative			1,084				880				3,558				2,678
Total stock-based compensation expense		$	2,291			$	2,005			$	7,866			$	6,128

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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-Publisher FASB
-Name Accounting Standards Codification
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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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