Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activities

The following summarizes the Company’s stock option activity for the year ended December 31, 2021:

	Shares			Weighted	Weighted Average
	Issuable			Average	Remaining	Aggregate
	under			Exercise	Contract	Intrinsic
	Options			Price	Term	Value
Outstanding at December 31, 2019		586,662		0.13	9.6 years	$	5,500
Granted		263,976		0.20
Exercised		(75,851	)	0.13
Forfeited or cancelled		(32,740	)	0.12
Outstanding at December 31, 2020		742,047		0.16	9.1 years	$	39,078
Exercisable at December 31, 2020		88,531		0.15	9.0 years	$	5,413
Outstanding at December 31, 2020		742,047		0.16	9.1 years	$	39,078
Granted		1,249,287		4.16
Exercised		(206,455	)	0.13
Forfeited or cancelled		(14,140	)	0.19
Outstanding at December 31, 2021		1,770,739		2.96	9.0 years	$	1,124,215
Exercisable at December 31, 2021		41,084		0.17	7.9 years	$	87,522

Summary of Assumptions Used in Black-Scholes Model

For the years ended December 31, 2020 and 2021, the fair value of employee and director stock option awards was estimated at the date of grant using a Black-Scholes option-pricing model with the following assumptions:

	Years Ended December 31,
	2020	2021
Expected term (years)	6.25	6.24
Expected volatility	87.30%	83.18%
Risk-free interest rate	0.50%	1.02%
Dividend yield	—	—
Fair value underlying common stock	$0.18	$2.95