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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Current assets:    
Cash and cash equivalents $ 181,131 $ 126,472
Marketable securities 91,400 89,284
Accounts receivable 23,081 12,744
Prepaid expenses and other current assets 16,982 11,285
Total current assets 312,594 239,785
Property, equipment and software, net 42,225 48,211
Other assets 23,924 24,505
Total assets 378,743 312,501
Current liabilities:    
Accounts payable 8,031 4,308
Accrued expenses and other current liabilities 34,198 27,139
Deferred revenue 4,456 10,700
Lease liabilities 3,988 3,020
Total current liabilities 50,673 45,167
Deferred revenue, net of current portion 6,926 9,153
Lease liabilities, net of current portion 25,260 27,553
Total liabilities 82,859 81,873
Stockholders' equity:    
Common stock, $0.01 par value -- 125,000,000 shares authorized, 56,244,771 and 48,958,763 shares outstanding at December 31, 2020 and December 31, 2019, respectively 562 490
Additional paid-in capital 1,067,150 872,204
Accumulated other comprehensive income (loss) (7) 16
Accumulated deficit (771,821) (642,082)
Total stockholders' equity 295,884 230,628
Total liabilities and stockholders' equity $ 378,743 $ 312,501