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Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 153,001 $ 276,726
Marketable securities 94,776 0
Accounts receivable 47 1,486
Prepaid expenses and other current assets (includes $285 and $169 at December 31, 2021 and 2020, respectively, attributable to related parties) 8,456 4,444
Total current assets 256,280 282,656
Marketable securities, long-term 67,652 0
Property and equipment, net 14,391 5,073
Operating lease, right-of-use assets, net 14,562 0
Other assets 602 602
Total assets 353,487 288,331
Current liabilities    
Accounts payable (includes $0 and $173 at December 31, 2021 and 2020, respectively, attributable to related parties) 4,764 1,787
Accrued and other current liabilities 7,744 8,371
Deferred revenue 2,599 6,586
Operating lease liabilities, current portion 1,231 0
Total current liabilities 16,338 16,744
Deferred revenue, net of current portion 2,491 13,226
Derivative liability 214 122
Operating lease liabilities, long -term portion 15,217 0
Other liabilities 120 1,852
Total liabilities 34,380 31,944
Commitments and contingencies (Note 9)
Stockholders' equity    
Preferred stock, $0.0001 par value, 10,000,000 shares authorized at December 31, 2021 2020; no shares issued and outstanding at December 31, 2021 and 2020, respectively. 0 0
Common stock, $0.0001 par value, 300,000,000 shares authorized at December 31, 2021 and 2020; 32,224,524 and 26,681,983 shares issued and outstanding at December 31, 2021 and 2020, respectively. 3 3
Additional paid-in-capital 526,523 392,063
Accumulated other comprehensive loss (423) 0
Accumulated deficit (206,996) (135,679)
Total stockholders' equity 319,107 256,387
Total liabilities and stockholders' equity $ 353,487 $ 288,331