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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Accumulated Deficit | Total
--- | --- | --- | --- | --- | ---
Balance at beginning at Dec. 31, 2022 | $ 52 | $ 771,699 | $ (884) | $ (510,632) | $ 260,235
Balance at beginning (in shares) at Dec. 31, 2022 | 51,672,579 |  |  |  |
Increase (decrease) in Stockholders' Equity |  |  |  |  |
Unrealized (loss) gain on marketable securities |  |  | 555 |  | 555
Sale of common shares, net of issuance costs |  | 827 |  |  | 827
Sale of common shares, net of issuance costs (in shares) | 68,696 |  |  |  |
Exercise of stock options |  | 243 |  |  | 243
Exercise of stock options (in shares) | 28,706 |  |  |  |
Issuance of common shares upon RSU vesting (in shares) | 219,378 |  |  |  |
Equity-based compensation expense |  | 6,170 |  |  | 6,170
Other |  | 2 |  |  | 2
Net Income (Loss) |  |  |  | (39,379) | (39,379)
Balance at end at Mar. 31, 2023 | $ 52 | 778,941 | (329) | (550,011) | 228,653
Balance at end (in shares) at Mar. 31, 2023 | 51,989,359 |  |  |  |
Balance at beginning at Dec. 31, 2022 | $ 52 | 771,699 | (884) | (510,632) | 260,235
Balance at beginning (in shares) at Dec. 31, 2022 | 51,672,579 |  |  |  |
Increase (decrease) in Stockholders' Equity |  |  |  |  |
Unrealized (loss) gain on marketable securities |  |  |  |  | 861
Net Income (Loss) |  |  |  |  | (119,663)
Balance at end at Sep. 30, 2023 | $ 56 | 797,927 | (23) | (630,295) | 167,665
Balance at end (in shares) at Sep. 30, 2023 | 56,260,574 |  |  |  |
Balance at beginning at Mar. 31, 2023 | $ 52 | 778,941 | (329) | (550,011) | 228,653
Balance at beginning (in shares) at Mar. 31, 2023 | 51,989,359 |  |  |  |
Increase (decrease) in Stockholders' Equity |  |  |  |  |
Unrealized (loss) gain on marketable securities |  |  | 266 |  | 266
Sale of common shares, net of issuance costs | $ 1 | 4,395 |  |  | 4,396
Sale of common shares, net of issuance costs (in shares) | 550,594 |  |  |  |
Exercise of stock options |  | 292 |  |  | 292
Exercise of stock options (in shares) | 53,333 |  |  |  |
Issuance of common shares upon RSU vesting (in shares) | 273,035 |  |  |  |
Exercise of pre-funded and common warrants | $ 2 | (2) |  |  |
Exercise of pre-funded and common warrants (in shares) | 2,293,466 |  |  |  |
Equity-based compensation expense |  | 6,818 |  |  | 6,818
Other |  | 1 |  |  | 1
Net Income (Loss) |  |  |  | (37,925) | (37,925)
Balance at end at Jun. 30, 2023 | $ 55 | 790,445 | (63) | (587,936) | 202,501
Balance at end (in shares) at Jun. 30, 2023 | 55,159,787 |  |  |  |
Increase (decrease) in Stockholders' Equity |  |  |  |  |
Unrealized (loss) gain on marketable securities |  |  | 40 |  | 40
Exercise of stock options |  | 280 |  |  | 280
Exercise of stock options (in shares) | 49,604 |  |  |  |
Issuance of common shares upon RSU vesting (in shares) | 24,290 |  |  |  |
Exercise of pre-funded and common warrants | $ 1 | (1) |  |  |
Exercise of pre-funded and common warrants (in shares) | 1,026,893 |  |  |  |
Equity-based compensation expense |  | 7,203 |  |  | 7,203
Net Income (Loss) |  |  |  | (42,359) | (42,359)
Balance at end at Sep. 30, 2023 | $ 56 | 797,927 | (23) | (630,295) | 167,665
Balance at end (in shares) at Sep. 30, 2023 | 56,260,574 |  |  |  |
Balance at beginning at Dec. 31, 2023 | $ 76 | 901,471 | 92 | (676,421) | 225,218
Balance at beginning (in shares) at Dec. 31, 2023 | 75,979,495 |  |  |  |
Increase (decrease) in Stockholders' Equity |  |  |  |  |
Unrealized (loss) gain on marketable securities |  |  | (142) |  | (142)
Exercise of stock options |  | 280 |  |  | 280
Exercise of stock options (in shares) | 47,293 |  |  |  |
Issuance of common shares upon RSU vesting (in shares) | 360,373 |  |  |  |
Exercise of pre-funded and common warrants | $ 4 | 6,102 |  |  | 6,106
Exercise of pre-funded and common warrants (in shares) | 3,357,493 |  |  |  |
Equity-based compensation expense |  | 8,164 |  |  | 8,164
Net Income (Loss) |  |  |  | (56,853) | (56,853)
Balance at end at Mar. 31, 2024 | $ 80 | 916,017 | (50) | (733,274) | 182,773
Balance at end (in shares) at Mar. 31, 2024 | 79,744,654 |  |  |  |
Balance at beginning at Dec. 31, 2023 | $ 76 | 901,471 | 92 | (676,421) | 225,218
Balance at beginning (in shares) at Dec. 31, 2023 | 75,979,495 |  |  |  |
Increase (decrease) in Stockholders' Equity |  |  |  |  |
Unrealized (loss) gain on marketable securities |  |  |  |  | 36
Net Income (Loss) |  |  |  |  | (179,840)
Balance at end at Sep. 30, 2024 | $ 80 | 935,249 | 128 | (856,261) | 79,196
Balance at end (in shares) at Sep. 30, 2024 | 80,081,535 |  |  |  |
Balance at beginning at Mar. 31, 2024 | $ 80 | 916,017 | (50) | (733,274) | 182,773
Balance at beginning (in shares) at Mar. 31, 2024 | 79,744,654 |  |  |  |
Increase (decrease) in Stockholders' Equity |  |  |  |  |
Unrealized (loss) gain on marketable securities |  |  | (4) |  | (4)
Exercise of stock options |  | 47 |  |  | 47
Exercise of stock options (in shares) | 6,617 |  |  |  |
Issuance of common shares upon RSU vesting (in shares) | 240,797 |  |  |  |
Equity-based compensation expense |  | 9,312 |  |  | 9,312
Net Income (Loss) |  |  |  | (58,508) | (58,508)
Balance at end at Jun. 30, 2024 | $ 80 | 925,376 | (54) | (791,782) | 133,620
Balance at end (in shares) at Jun. 30, 2024 | 79,992,068 |  |  |  |
Increase (decrease) in Stockholders' Equity |  |  |  |  |
Unrealized (loss) gain on marketable securities |  |  | 182 |  | 182
Exercise of stock options |  | 223 |  |  | 223
Exercise of stock options (in shares) | 41,078 |  |  |  |
Issuance of common shares upon RSU vesting (in shares) | 48,389 |  |  |  |
Equity-based compensation expense |  | 9,650 |  |  | 9,650
Net Income (Loss) |  |  |  | (64,479) | (64,479)
Balance at end at Sep. 30, 2024 | $ 80 | $ 935,249 | $ 128 | $ (856,261) | $ 79,196
Balance at end (in shares) at Sep. 30, 2024 | 80,081,535 |  |  |  |

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