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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 16,438 $ 32,507
Short-term marketable securities 112,150 67,937
Prepaid expenses and other current assets 4,721 6,402
Total current assets 133,309 106,846
Long-term marketable securities 8,041  
Property and equipment, net 9,088 10,776
Right of use asset - operating lease 13,889 15,527
Restricted cash 1,097 1,097
Prepaid research and development, net of current portion 9,309 9,590
Other assets 3 4
Total assets 174,736 143,840
Current liabilities:    
Accounts payable 1,944 1,995
Accrued expenses 4,402 3,773
Deferred revenue 531  
Lease liability - operating lease 3,191 2,531
Finance lease obligations 12 2
Total current liabilities 10,080 8,301
Long-term liabilities:    
Lease liability - operating lease, net of current portion 17,372 20,273
Finance lease obligations, net of current portion 18  
Other long-term liabilities   131
Total long-term liabilities 17,390 20,404
Commitments and contingencies (Note 14)
Stockholders' equity    
Common stock, $0.001 par value 250,000,000 shares authorized as of December 31, 2021 and December 31, 2020. 69,698,844 shares issued and outstanding as of December 31, 2021 and 38,183,273 shares issued and outstanding as of December 31, 2020. 70 38
Additional paid-in capital 438,113 345,394
Accumulated other comprehensive income (loss) (45) 14
Accumulated deficit (290,872) (230,311)
Total stockholders' equity 147,266 115,135
Total liabilities and stockholders' equity $ 174,736 $ 143,840