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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands | Rights Offering Warrants [Member] Common Stock [Member] | Rights Offering Warrants [Member] Additional Paid-in Capital [Member] | Rights Offering Warrants [Member] Retained Earnings [Member] | Rights Offering Warrants [Member] | Rights Offering [Member] Common Stock [Member] | Rights Offering [Member] Additional Paid-in Capital [Member] | Rights Offering [Member] Retained Earnings [Member] | Rights Offering [Member] | ATM Offering [Member] Common Stock [Member] | ATM Offering [Member] Additional Paid-in Capital [Member] | ATM Offering [Member] Retained Earnings [Member] | ATM Offering [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2023 |  |  |  |  |  |  |  |  |  |  |  |  | 55,144 |  |  |
Balance at Dec. 31, 2023 |  |  |  |  |  |  |  |  |  |  |  |  | $ 55 | $ 381,220 | $ (336,915) | $ 44,360
Issuance of common stock upon exercise of stock options (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 111 |  |  |
Issuance of common stock upon exercise of stock options |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | 498 | 0 | 498
Issuance of common stock under employee stock purchase plan (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 118 |  |  |
Issuance of common stock under employee stock purchase plan |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | 478 | 0 | 478
Issuance of common stock pursuant to warrant exercise (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 142 |  |  |
Issuance of common stock pursuant to warrant exercise |  |  |  |  |  |  |  |  |  |  |  |  | $ 1 | 1,565 | 0 | 1,566
Stock-based compensation expense |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 6,793 | 0 | 6,793
Net loss |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | 0 | (34,200) | (34,200)
Balance (in shares) at Sep. 30, 2024 |  |  |  |  |  |  |  |  |  |  |  |  | 61,516 |  |  |
Balance at Sep. 30, 2024 |  |  |  |  |  |  |  |  |  |  |  |  | $ 62 | 450,184 | (371,115) | 79,131
Issuance of shares (in shares) |  |  |  |  | 6,000 |  |  |  | 1 |  |  |  |  |  |  |
Issuance of shares |  |  |  |  | $ 6 | $ 59,630 | $ 0 | $ 59,636 | $ 0 | $ 0 | $ 0 | $ 0 |  |  |  |
Issuance of equity-classified subscription rights as part of rights offering (Note 6) |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 47,700 | 0 | 47,700
Rights offering deemed pro-rata distribution to shareholders (Note 6) |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | (47,700) | 0 | (47,700)
Balance (in shares) at Jun. 30, 2024 |  |  |  |  |  |  |  |  |  |  |  |  | 55,228 |  |  |
Balance at Jun. 30, 2024 |  |  |  |  |  |  |  |  |  |  |  |  | $ 55 | 385,349 | (358,435) | 26,969
Issuance of common stock upon exercise of stock options (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 105 |  |  |
Issuance of common stock upon exercise of stock options |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | 476 | 0 | 476
Issuance of common stock under employee stock purchase plan (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 40 |  |  |
Issuance of common stock under employee stock purchase plan |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | 182 | 0 | 182
Issuance of common stock pursuant to warrant exercise (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 142 |  |  |
Issuance of common stock pursuant to warrant exercise |  |  |  |  |  |  |  |  |  |  |  |  | $ 1 | 1,565 | 0 | 1,566
Stock-based compensation expense |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 2,982 | 0 | 2,982
Net loss |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | 0 | (12,680) | (12,680)
Balance (in shares) at Sep. 30, 2024 |  |  |  |  |  |  |  |  |  |  |  |  | 61,516 |  |  |
Balance at Sep. 30, 2024 |  |  |  |  |  |  |  |  |  |  |  |  | $ 62 | 450,184 | (371,115) | 79,131
Issuance of shares (in shares) |  |  |  |  | 6,000 |  |  |  | 1 |  |  |  |  |  |  |
Issuance of shares |  |  |  |  | $ 6 | $ 59,630 | $ 0 | $ 59,636 | $ 0 | $ 0 | $ 0 | $ 0 |  |  |  |
Balance (in shares) at Dec. 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  | 65,926 |  |  |
Balance at Dec. 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  | $ 66 | 505,296 | (390,500) | 114,862
Issuance of common stock upon exercise of stock options (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 493 |  |  |
Issuance of common stock upon exercise of stock options |  |  |  |  |  |  |  |  |  |  |  |  | $ 1 | 2,099 | 0 | 2,100
Issuance of common stock under employee stock purchase plan (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 45 |  |  |
Issuance of common stock under employee stock purchase plan |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | 593 | 0 | 593
Issuance of common stock pursuant to warrant exercise (in shares) | 1,274 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock pursuant to warrant exercise | $ 1 | $ 13,999 | $ 0 | $ 14,000 |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 16,487 | 0 | 16,487
Net loss |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | 0 | (55,348) | (55,348)
Balance (in shares) at Sep. 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |  | 67,738 |  |  |
Balance at Sep. 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |  | $ 68 | 538,474 | (445,848) | 92,694
Rights offering deemed pro-rata distribution to shareholders (Note 6) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0
Balance (in shares) at Jun. 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |  | 67,278 |  |  |
Balance at Jun. 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |  | $ 67 | 530,883 | (426,463) | 104,487
Issuance of common stock upon exercise of stock options (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 439 |  |  |
Issuance of common stock upon exercise of stock options |  |  |  |  |  |  |  |  |  |  |  |  | $ 1 | 1,707 | 0 | 1,708
Issuance of common stock under employee stock purchase plan (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 19 |  |  |
Issuance of common stock under employee stock purchase plan |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | 241 | 0 | 241
Issuance of common stock pursuant to warrant exercise (in shares) | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock pursuant to warrant exercise | $ 0 | $ 25 | $ 0 | $ 25 |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 5,618 | 0 | 5,618
Net loss |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | 0 | (19,385) | (19,385)
Balance (in shares) at Sep. 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |  | 67,738 |  |  |
Balance at Sep. 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |  | $ 68 | $ 538,474 | $ (445,848) | $ 92,694

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