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CONDENSED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-In Capital | Accumulated Deficit | Accumulated Other Comprehensive (Loss) Income
--- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2023 |  | 232,453,190 |  |  |
Beginning balance at Dec. 31, 2023 | $ 166,816 | $ 23 | $ 1,012,773 | $ (846,204) | $ 224
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Issuance of common stock under employee stock purchase plan (in shares) |  | 479,609 |  |  |
Issuance of common stock under employee stock purchase plan | 2,227 |  | 2,227 |  |
Issuance of common stock for services (in shares) |  | 40,549 |  |  |
Issuance of common stock for services | 257 |  | 257 |  |
Issuance of common stock upon exercise of options (in shares) |  | 2,227,627 |  |  |
Issuance of common stock upon exercise of options | 5,299 | $ 1 | 5,298 |  |
Issuance of common stock upon vesting of restricted stock units (in shares) |  | 1,689,456 |  |  |
Stock-based compensation | 27,518 |  | 27,518 |  |
Unrealized (losses) gains on available-for-sale securities | (39) |  |  |  | (39)
Net loss | (43,781) |  |  | (43,781) |
Ending balance (in shares) at Sep. 30, 2024 |  | 236,890,431 |  |  |
Ending balance at Sep. 30, 2024 | 158,297 | $ 24 | 1,048,073 | (889,985) | 185
Beginning balance (in shares) at Jun. 30, 2024 |  | 235,401,398 |  |  |
Beginning balance at Jun. 30, 2024 | 146,990 | $ 23 | 1,036,244 | (889,176) | (101)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Issuance of common stock under employee stock purchase plan (in shares) |  | 226,297 |  |  |
Issuance of common stock under employee stock purchase plan | 1,189 |  | 1,189 |  |
Issuance of common stock upon exercise of options (in shares) |  | 663,358 |  |  |
Issuance of common stock upon exercise of options | 1,508 | $ 1 | 1,507 |  |
Issuance of common stock upon vesting of restricted stock units (in shares) |  | 599,378 |  |  |
Stock-based compensation | 9,133 |  | 9,133 |  |
Unrealized (losses) gains on available-for-sale securities | 286 |  |  |  | 286
Net loss | (809) |  |  | (809) |
Ending balance (in shares) at Sep. 30, 2024 |  | 236,890,431 |  |  |
Ending balance at Sep. 30, 2024 | 158,297 | $ 24 | 1,048,073 | (889,985) | 185
Beginning balance (in shares) at Dec. 31, 2024 |  | 238,015,825 |  |  |
Beginning balance at Dec. 31, 2024 | 173,289 | $ 24 | 1,058,548 | (885,340) | 57
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Issuance of common stock under employee stock purchase plan (in shares) |  | 385,593 |  |  |
Issuance of common stock under employee stock purchase plan | 1,718 |  | 1,718 |  |
Issuance of common stock for services (in shares) |  | 87,256 |  |  |
Issuance of common stock for services | $ 315 |  | 315 |  |
Issuance of common stock upon exercise of options (in shares) | 1,642,000 | 1,641,801 |  |  |
Issuance of common stock upon exercise of options | $ 3,566 |  | 3,566 |  |
Issuance of common stock upon vesting of restricted stock units (in shares) |  | 2,841,363 |  |  |
Stock-based compensation | 36,517 |  | 36,517 |  |
Unrealized (losses) gains on available-for-sale securities | 67 |  |  |  | 67
Net loss | (61,192) |  |  | (61,192) |
Ending balance (in shares) at Sep. 30, 2025 |  | 242,971,838 |  |  |
Ending balance at Sep. 30, 2025 | 154,280 | $ 24 | 1,100,664 | (946,532) | 124
Beginning balance (in shares) at Jun. 30, 2025 |  | 240,765,516 |  |  |
Beginning balance at Jun. 30, 2025 | 139,531 | $ 24 | 1,085,108 | (945,563) | (38)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Issuance of common stock under employee stock purchase plan (in shares) |  | 162,859 |  |  |
Issuance of common stock under employee stock purchase plan | 703 |  | 703 |  |
Issuance of common stock upon exercise of options (in shares) |  | 860,811 |  |  |
Issuance of common stock upon exercise of options | 2,111 |  | 2,111 |  |
Issuance of common stock upon vesting of restricted stock units (in shares) |  | 1,182,652 |  |  |
Stock-based compensation | 12,742 |  | 12,742 |  |
Unrealized (losses) gains on available-for-sale securities | 162 |  |  |  | 162
Net loss | (969) |  |  | (969) |
Ending balance (in shares) at Sep. 30, 2025 |  | 242,971,838 |  |  |
Ending balance at Sep. 30, 2025 | $ 154,280 | $ 24 | $ 1,100,664 | $ (946,532) | $ 124

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