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Condensed Consolidated Balance Sheets (unaudited) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Current assets:    
Cash and cash equivalents $ 22,055 $ 40,577
Prepaid expenses and other current assets 964 2,448
Total current assets 23,019 43,025
Property and equipment, net 1,122 1,404
Operating lease right-of-use assets 17,575 19,924
Restricted cash 1,993 1,993
Total assets 43,709 66,346
Current liabilities:    
Accounts payable 627 1,179
Restructuring liability 3,059 4,347
Accrued expenses and other current liabilities 1,103 2,586
Operating lease liabilities 4,684 4,121
Deferred revenue 7 398
Total current liabilities 9,480 12,631
Operating lease liabilities, net of current portion 26,695 30,259
Deferred revenue, net of current portion 11,862 11,862
Total liabilities 48,037 54,752
Commitments and contingencies (Note 14)
Stockholders' (deficit) equity:    
Preferred stock, $0.001 par value; 10,000,000 shares authorized at September 30, 2025 and December 31, 2024; no shares issued and outstanding at September 30, 2025 and December 31, 2024
Common stock, $0.001 par value; 200,000,000 shares authorized at September 30, 2025 and December 31, 2024; 1,644,454 and 1,310,308 shares issued and outstanding as of September 30, 2025 and December 31, 2024, respectively 2 1
Additional paid-in capital 422,428 416,383
Accumulated deficit (426,758) (404,790)
Total stockholders' (deficit) equity (4,328) 11,594
Total liabilities and stockholders' (deficit) equity $ 43,709 $ 66,346