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Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2024
Equity [Abstract] |
Summary of Changes in Stockholders' Equity | The following table presents the changes in stockholders’ equity for the three months ended March 31, 2024:
(In thousands, except share data) |  | Common Stock $0.0001 Par Value |  |  | Additional Paid-In Capital |  |  | Accumulated Other Comprehensive (Loss)/Income |  |  | Accumulated Deficit |  |  | Total Stockholders’ Equity |
|  | Shares |  |  | Amount |  |  |  |  |  |  |  |  |  |  |  |  |
Balance as of December 31, 2023 |  |  | 84,826,632 |  |  | $ | 8 |  |  | $ | 1,456,370 |  |  | $ | 218 |  |  | $ | (902,400 | ) |  | $ | 554,196 |
Stock purchase under ESPP |  |  | 35,463 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Stock-based compensation expense |  |  | — |  |  |  | — |  |  |  | 8,899 |  |  |  | — |  |  |  | — |  |  |  | 8,899 |
Unrealized (loss) on investments |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (974 | ) |  |  | — |  |  |  | (974 | )
Vesting of RSUs |  |  | 3,750 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Employee withholdings ESPP |  |  | — |  |  |  | — |  |  |  | 309 |  |  |  | — |  |  |  | — |  |  |  | 309 |
Proceeds from exercise of stock options |  |  | 113,841 |  |  |  | — |  |  |  | 1,859 |  |  |  | — |  |  |  | — |  |  |  | 1,859 |
Net loss |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (72,400 | ) |  |  | (72,400 | )
Balance as of March 31, 2024 |  |  | 84,979,686 |  |  | $ | 8 |  |  | $ | 1,467,437 |  |  | $ | (756 | ) |  | $ | (974,800 | ) |  | $ | 491,889 |
The following table presents the changes in stockholders’ equity for the three months ended March 31, 2023:
(In thousands, except share data) |  | Common Stock $0.0001 Par Value |  |  | Additional Paid-In Capital |  |  | Accumulated Other Comprehensive (Loss)/Income |  |  | Accumulated Deficit |  |  | Total Stockholders’ Equity |
|  | Shares |  |  | Amount |  |  |  |  |  |  |  |  |  |  |  |  |
Balance as of December 31, 2022 |  |  | 68,111,385 |  |  | $ | 7 |  |  | $ | 1,161,288 |  |  | $ | (806 | ) |  | $ | (693,040 | ) |  | $ | 467,449 |
Stock purchase under ESPP |  |  | 16,537 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Stock-based compensation expense |  |  | — |  |  |  | — |  |  |  | 6,238 |  |  |  | — |  |  |  | — |  |  |  | 6,238 |
Unrealized gain on short-term investments |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 470 |  |  |  | — |  |  |  | 470 |
Vesting of RSUs |  |  | 5,000 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Employee withholdings ESPP |  |  | — |  |  |  | — |  |  |  | 196 |  |  |  | — |  |  |  | — |  |  |  | 196 |
Prefunded warrants, exercise |  |  | 85,998 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Proceeds from exercise of stock options |  |  | 276,506 |  |  |  | — |  |  |  | 2,278 |  |  |  | — |  |  |  | — |  |  |  | 2,278 |
Net loss |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (41,126 | ) |  |  | (41,126 | )
Balance as of March 31, 2023 |  |  | 68,495,426 |  |  | $ | 7 |  |  | $ | 1,170,000 |  |  | $ | (336 | ) |  | $ | (734,166 | ) |  | $ | 435,505 |
At-the Market Program

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-2 + Details
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