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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 123,469 $ 181,131
Marketable securities 120,147 91,400
Accounts receivable 10,386 23,081
Inventory, net 4,388 0
Prepaid expenses and other current assets 21,170 16,982
Total current assets 279,560 312,594
Property, equipment and software, net 37,676 42,225
Other non current assets 18,009 23,924
Total assets 335,245 378,743
Current liabilities:    
Accounts payable 15,500 8,031
Accrued expenses and other current liabilities 33,755 34,198
Deferred revenue 20,646 4,456
Lease liabilities 4,677 3,988
Total current liabilities 74,578 50,673
Deferred revenue, net of current portion 0 6,926
Lease liabilities, net of current portion 20,791 25,260
Other non current liabilities 258 0
Total liabilities 95,627 82,859
Stockholders' equity:    
Common stock, 0.01 par value -- 125,000,000 shares authorized, 61,307,428 and 56,244,771 shares outstanding at December 31, 2021 and December 31, 2020, respectively 613 562
Additional paid-in capital 1,213,002 1,067,150
Accumulated other comprehensive income (loss) (61) (7)
Accumulated deficit (973,936) (771,821)
Total stockholders' equity 239,618 295,884
Total liabilities and stockholders' equity $ 335,245 $ 378,743