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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Current assets:    
Cash and cash equivalents $ 201,637 $ 126,472
Marketable securities 79,022 89,284
Accounts receivable 18,777 12,744
Prepaid expenses and other current assets 10,632 11,285
Total current assets 310,068 239,785
Property, equipment and software, net 41,423 48,211
Other assets 22,889 24,505
Total assets 374,380 312,501
Current liabilities:    
Accounts payable 4,380 4,308
Accrued expenses and other current liabilities 32,674 27,139
Deferred revenue 9,259 10,700
Lease liabilities 3,808 3,020
Total current liabilities 50,121 45,167
Deferred revenue, net of current portion 5,778 9,153
Lease liabilities, net of current portion 24,651 27,553
Other non-current liabilities 2,245 0
Total liabilities 82,795 81,873
Stockholders' equity:    
Common stock, $0.01 par value -- 125,000,000 shares authorized, 56,174,932 and 48,958,763 shares outstanding at September 30, 2020 and December 31, 2019, respectively 562 490
Additional paid-in capital 1,060,755 872,204
Accumulated other comprehensive income 2 16
Accumulated deficit (769,734) (642,082)
Total stockholders' equity 291,585 230,628
Total liabilities and stockholders' equity $ 374,380 $ 312,501