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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 190,531 $ 181,131
Marketable securities 108,367 91,400
Accounts receivable 13,759 23,081
Inventory, net 3,979 0
Prepaid expenses and other current assets 18,062 16,982
Total current assets 334,698 312,594
Property, equipment and software, net 38,684 42,225
Other assets 18,778 23,924
Total assets 392,160 378,743
Current liabilities:    
Accounts payable 6,170 8,031
Accrued expenses and other current liabilities 41,859 34,198
Deferred revenue 16,314 4,456
Lease liabilities 4,521 3,988
Total current liabilities 68,864 50,673
Deferred revenue, net of current portion 9,575 6,926
Lease liabilities, net of current portion 22,025 25,260
Other non current liabilities 258 0
Total liabilities 100,722 82,859
Stockholders' equity:    
Common stock, $0.01 par value -- 125,000,000 shares authorized, 61,254,693 and 56,244,771 shares outstanding at September 30, 2021 and December 31, 2020, respectively 613 562
Additional paid-in capital 1,206,742 1,067,150
Accumulated other comprehensive income (loss) (3) (7)
Accumulated deficit (915,914) (771,821)
Total stockholders' equity 291,438 295,884
Total liabilities and stockholders' equity $ 392,160 $ 378,743