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Stock-based compensation (Tables)

3 Months Ended

Mar. 31, 2025

Share-Based Payment Arrangement [Abstract]

Schedule of Black-Scholes Option-Pricing Model

The following table presents, on a weighted average basis, the assumptions used in the Black-Scholes option-pricing model to determine the grant-date fair value of stock options granted to employees and directors:

			Three Months Ended March 31,
			2025						2024
Risk-free interest rate			4.3		%				4.1		%
Expected term (in years)			6.1						6.0
Expected volatility			51.0		%				49.5		%
Expected dividend yield			0		%				0		%

Schedule of Stock Option Activity

The following table summarizes the Company’s stock option activity since December 31, 2024:

			Number of shares						Weighted average exercise price						Weighted average remaining contractual term						Aggregate intrinsic value
															(in years)						(in thousands)
Outstanding as of December 31, 2024			6,296,505						$	2.39					6.18						$	135
Granted			1,011,000						3.50
Exercised			(273,385)						1.07												$	330
Expired			(73,864)						8.32
Forfeited			(6,530)						0.98
Outstanding as of March 31, 2025			6,953,726						$	2.54					6.75						$	7,985
Options vested and expected to vest as of March 31, 2025			6,953,726						$	2.54					6.75						$	7,985
Options exercisable as of March 31, 2025			4,504,464						$	2.65					5.57						$	5,795

Schedule of Restricted Stock Units Activity

The following table summarizes the Company's restricted stock units activity since December 31, 2024:

			Number of shares						Weighted average fair value
Unvested as of December 31, 2024			1,941,688						$	1.46
Granted			1,039,500						$	3.50
Vested			(334,137)						$	3.13
Forfeited			(15,151)						$	0.98
Unvested as of March 31, 2025			2,631,900						$	2.05

Schedule of ESPP Black-Scholes Option-Pricing Model

The following weighted average assumptions were used in the calculation of fair value of shares under the 2021 ESPP at the grant date for both the three months ended March 31, 2025 and 2024:

			Three Months Ended March 31,
			2025						2024
Risk-free interest rate			4.5		%				5.4		%
Expected term (in years)			0.5						0.5
Expected volatility			44.9		%				49.4		%
Expected dividend yield			0		%				0		%

Schedule of Stock-Based Compensation Expense

Stock-based compensation expense was classified in the condensed consolidated statements of operations as follows (in thousands):

			Three Months Ended March 31,
			2025						2024
Cost of revenue			$	92					$	147
Research and development			140						129
Sales and marketing			90						105
General and administrative			720						704
Total stock-based compensation expense			$	1,042					$	1,085

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Tabular disclosure of the changes in outstanding nonvested restricted stock shares.

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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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