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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 218,496 $ 181,131
Marketable securities 124,681 91,400
Accounts receivable 7,148 23,081
Inventory 6,172 0
Prepaid expenses and other current assets 18,222 16,982
Total current assets 374,719 312,594
Property, equipment and software, net 40,475 42,225
Other assets 20,251 23,924
Total assets 435,445 378,743
Current liabilities:    
Accounts payable 10,346 8,031
Accrued expenses and other current liabilities 34,965 34,198
Deferred revenue 3,520 4,456
Lease liabilities 4,212 3,988
Total current liabilities 53,043 50,673
Deferred revenue, net of current portion 7,260 6,926
Lease liabilities, net of current portion 24,353 25,260
Other non current liabilities 258 0
Total liabilities 84,914 82,859
Stockholders' equity:    
Common stock, $0.01 par value -- 125,000,000 shares authorized, 60,011,206 and 56,244,771 shares outstanding at March 31, 2021 and December 31, 2020, respectively 600 562
Additional paid-in capital 1,173,013 1,067,150
Accumulated other comprehensive income (loss) 11 (7)
Accumulated deficit (823,093) (771,821)
Total stockholders' equity 350,531 295,884
Total liabilities and stockholders' equity $ 435,445 $ 378,743