Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 93,287 $ 170,056
Marketable securities 108,346 1,002
Restricted cash 11,285 0
Prepaid expenses and other current assets 7,672 4,332
Total current assets 220,590 175,390
Long-term restricted cash 6,005 992
Property and equipment, net 21,622 22,105
Operating lease right-of-use assets 22,920 21,344
Deposits and other long-term assets 2,352 1,736
Long-term marketable securities 4,617 0
Total assets 278,106 221,567
Current liabilities:    
Accounts payable 4,230 9,578
Accrued compensation 6,925 6,331
Accrued liabilities 411 677
Accrued research and development expenses 3,706 1,053
Lease liabilities, current portion 7,483 5,874
Deferred revenue, current portion 17,201 3,475
Total current liabilities 39,956 26,988
Other non-current liabilities 0 395
Lease liabilities, net of current portion 18,936 19,225
Deferred revenue, net of current portion 3,128 8,220
Total liabilities 62,020 54,828
Commitments and contingencies (Notes 6 and 7)
Stockholders’ equity:    
Preferred stock, $0.0001 par value; 10,000,000 shares authorized; no shares issued and outstanding at December 31, 2021 and 2020 0 0
Common stock, $0.0001 par value; 300,000,000 shares authorized at December 31, 2021 and 2020; 69,047,878 and 47,552,693 shares issued and outstanding at December 31, 2021 and 2020, respectively 20 18
Additional paid-in capital 617,523 493,023
Accumulated other comprehensive gain (73) 0
Accumulated deficit (401,384) (326,302)
Total stockholders’ equity 216,086 166,739
Total liabilities and stockholders’ equity $ 278,106 $ 221,567