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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Current assets    
Cash and cash equivalents $ 55,143 $ 88,756
Grants receivable 0 806
Prepaid expenses and other current assets 1,537 1,685
Total current assets 56,680 91,247
Property and equipment, net 304 451
Operating lease right-of-use assets 3,383 3,986
Investments in related parties 874 723
Other assets 75 106
Total assets 61,316 96,513
Current liabilities    
Accounts payable 2,218 4,710
Accrued expenses 4,908 3,219
Operating lease liabilities, current 968 894
Financing obligation, current 64 58
Deferred revenue, current 0 2,301
Warrant liability 24 114
Total current liabilities 8,182 11,296
Operating lease liabilities, noncurrent 2,738 3,475
Financing obligation, noncurrent 186 235
Total liabilities 11,106 15,006
Commitments and contingencies (Note 9)
Stockholders' equity    
Common stock, $0.01 par value per share; 300,000,000 shares authorized; 30,113,582 and 29,959,060 shares issued and outstanding as of September 30, 2022 and December 31, 2021, respectively 301 300
Additional paid-in capital 297,109 296,445
Accumulated other comprehensive income (loss) 302 (103)
Accumulated deficit (247,502) (215,135)
Total stockholders' equity 50,210 81,507
Total liabilities and stockholders' equity $ 61,316 $ 96,513