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Stock-based compensation (Tables) | 3 Months Ended
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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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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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