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Equity Incentive Plan (Tables) | 3 Months Ended
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Mar. 31, 2024
Equity [Abstract] |
Summary of Stock Option Activity | The following table summarizes the stock option activity for the three months ended March 31, 2024:
|  | Shares (in thousands) |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term (Years) |
Outstanding at December 31, 2023 |  |  | 24,575 |  |  | $ | 7.06 |  |  |  | 5.60 |
Granted |  |  | 6,331 |  |  | $ | 2.17 |  |  |  |
Exercised |  |  | (40 | ) |  | $ | 1.88 |  |  |  |
Expired and forfeited |  |  | (1,486 | ) |  | $ | 10.35 |  |  |  |
Outstanding at March 31, 2024 |  |  | 29,380 |  |  | $ | 5.85 |  |  |  | 7.23 |
Summary of Fair Value of Option Grant on Grant Date and Employee Stock Purchase Plan Using Black-Scholes Option Pricing Model and Market Based Stock Option Grants Monte Carlo Simulation Model | We estimated the fair value of each option grant on the grant date using the Black-Scholes option pricing model and for market-based stock option grants using the Monte Carlo simulation model. The following are the weighted-average assumptions:
|  | For the Three Months Ended |
|  | March 31, |
|  | 2024 |  |  | 2023 |
Risk-free interest rate |  |  | 4.2 | % |  |  | 3.7 | %
Dividend yield |  |  | 0.0 | % |  |  | 0.0 | %
Volatility |  |  | 79.7 | % |  |  | 63.9 | %
Expected life (years) |  |  | 4 |  |  |  | 6 |
Summary of Restricted Stock Unit Activity | The followin g table summarizes the restricted stock unit activity (“RSUs”) for the three months ended March 31, 2024:
|  | Shares (in thousands) |  |  | Weighted-Average Grant Date Fair Value |
Outstanding at December 31, 2023 |  |  | 1,405 |  |  | $ | 4.43 |
Granted |  |  | 949 |  |  | $ | 2.16 |
Released |  |  | (125 | ) |  | $ | 2.56 |
Expired and forfeited |  |  | (256 | ) |  | $ | 3.85 |
Outstanding at March 31, 2024 |  |  | 1,973 |  |  | $ | 3.09 |
The fair value of RSUs i s estimated based on the closing market price of our common stock on the date of the grant. RSUs generally vest quarterly over a four-ye ar period.
Summary of Stock-Based Compensation Expense related to Stock-Based Payment Awards Granted | The following table summarize s stock-based compensation expense related to stock-based payment awards granted pursuant to all of our equity compensation arrangements (in thousands):
|  | Three Months Ended March 31, |  |
|  | 2024 |  |  | 2023 |  |
General and administrative |  | $ | 1,878 |  |  | $ | 3,532 |  |
Sales and marketing |  |  | 796 |  |  |  | 2,679 |  |
Research and development |  |  | 701 |  |  |  | 1,736 |  |
Total stock-based compensation expense |  | $ | 3,375 |  |  | $ | 7,947 |  |

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition 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. + 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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