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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Current assets:    
Cash and cash equivalents $ 196,532 $ 126,472
Marketable securities 36,267 89,284
Accounts receivable 19,205 12,744
Prepaid expenses and other current assets 8,192 11,285
Total current assets 260,196 239,785
Property, equipment and software, net 43,887 48,211
Other assets 23,509 24,505
Total assets 327,592 312,501
Current liabilities:    
Accounts payable 2,766 4,308
Accrued expenses and other current liabilities 30,475 27,139
Deferred revenue 9,267 10,700
Lease liabilities 3,386 3,020
Total current liabilities 45,894 45,167
Deferred revenue, net of current portion 6,819 9,153
Lease liabilities, net of current portion 25,653 27,553
Other non current liabilities 1,442 0
Total liabilities 79,808 81,873
Stockholders' equity:    
Common stock, $0.01 par value -- 125,000,000 shares authorized, 53,365,003 and 48,958,763 shares outstanding at June 30, 2020 and December 31, 2019, respectively 534 490
Additional paid-in capital 980,924 872,204
Accumulated other comprehensive income 17 16
Accumulated deficit (733,691) (642,082)
Total stockholders' equity 247,784 230,628
Total liabilities and stockholders' equity $ 327,592 $ 312,501