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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2024

Share-Based Payment Arrangement [Abstract]

Summary of Options Granted and Outstanding

The following table summarizes information about these options granted and outstanding:

		Number of Shares Subject to Options Outstanding				Weighted- Average Exercise Price Per Share				Weighted- Average Remaining Contractual Life (In Years)				Aggregate Intrinsic Value (In Thousands)
Outstanding – December 31, 2023			7,251,663			$	3.66				6.9			$	20,014
Granted			84,392				8.43
Expired			—				—
Cancelled			(120,387	)			3.68
Exercised			(1,102,513	)			2.63
Outstanding – December 31, 2024			6,113,155			$	3.91				6.3			$	27,008
Vested and expected to vest at December 31, 2024			6,073,028			$	3.90				6.3			$	26,849
Vested and exercisable at December 31, 2024			5,380,324			$	3.77				6.1			$	24,500

Schedule of Fair Values Calculated using Black-Scholes Option Pricing Model

The fair values calculated using the Black-Scholes option pricing model were estimated on each grant date using the following assumptions:

		Year Ended
		December 31,
		2024				2023
Expected volatility		78.8% - 78.9%				70.1% - 72.4%
Risk-free interest rate		4.1% - 4.2%				3.7% - 4.2%
Expected term (in years)		5.2 - 5.3				5.3 - 7.0
Expected dividend yield			0	%			0	%

Summary of Information about RSUs Granted and Outstanding

The following table summarizes information about RSUs granted and outstanding under the 2021 Plan:

		Number of Awards				Weighted-Average Grant Date Fair Value
Outstanding – December 31, 2023			2,692,459			$	2.01
Granted			249,040				8.52
Forfeited			(52,992	)			2.02
Vested			(1,257,345	)			2.54
Outstanding – December 31, 2024			1,631,162			$	2.60

Schedule of Impact of Stock-based Compensation Expense in Statements of Operations

The following table presents the impact of stock-based compensation expense in the statements of operations for the periods indicated (in thousands):

		Year Ended
		December 31,
		2024				2023
Research and development expense		$	2,502			$	1,574
Sales and marketing expense			390				657
General and administrative expense			4,121				3,042
Total employee stock-based compensation		$	7,013			$	5,273

Summary of Unrecognized Stock-based Compensation Expense for Outstanding Unvested Stock Options and RSUs

The information about unrecognized stock-based compensation expense for outstanding unvested stock options and RSUs as of December 31, 2024 was as follows (in thousands, except years):

		Unrecognized Stock-Based Compensation Expense				Weighted-Average Period of Recognition (in years)
Stock Options		$	1,975				1.0
RSUs			3,099				1.9
Total unrecognized stock-based compensation expense		$	5,074

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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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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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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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Tabular disclosure of cost not yet recognized and weighted-average period over which cost is expected to be recognized for nonvested award under share-based payment arrangement.

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