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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 164,935 $ 187,242
Short-term marketable securities 50,146 81,145
Prepaid expenses and other current assets 6,726 2,958
Total current assets 221,807 271,345
Property and equipment, net 101 131
Operating lease right-of-use asset 1,511 1,662
Other assets, noncurrent 114 201
Total assets 223,533 273,339
Current liabilities:    
Accounts payable 6,784 3,428
Accrued expenses and other current liabilities 16,756 9,683
Total current liabilities 23,540 13,111
Operating lease liability, noncurrent 1,365 1,516
Total liabilities 24,905 14,627
Commitments and contingencies (Note 11)
Stockholders' equity:    
Common stock, $0.0001 par value, 150,000,000 shares authorized as of September 30, 2021 and December 31, 2020; 34,875,302 and 34,741,649 shares issued and outstanding as of September 30, 2021 and December 31, 2020, respectively 4 4
Additional paid-in capital 476,521 468,238
Accumulated other comprehensive loss (17) (3)
Accumulated deficit (277,880) (209,527)
Total stockholders' equity 198,628 258,712
Total liabilities and stockholders' equity $ 223,533 $ 273,339