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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Current assets:    
Cash and cash equivalents $ 126,472 $ 220,128
Marketable securities 89,284 12,735
Accounts receivable 12,744 29,583
Prepaid expenses 11,285 6,678
Total current assets 239,785 269,124
Property, equipment and software, net 48,211 56,712
Other assets 24,505 6,294
Total assets 312,501 332,130
Current liabilities:    
Accounts payable 4,308 4,005
Accrued expenses 27,139 33,196
Deferred revenue 10,700 21,721
Deferred rent 0 1,018
Lease Liabilities 3,020 0
Total current liabilities 45,167 59,940
Deferred revenue, net of current portion 9,153 19,001
Lease liabilities, net of current portion 27,553 0
Deferred rent, net of current portion 0 10,312
Total liabilities 81,873 89,253
Stockholders' equity:    
Common stock, $0.01 par value -- 125,000,000 shares authorized, 48,958,763 and 42,353,301 shares outstanding at December 31, 2019 and December 31, 2018, respectively 490 424
Additional paid-in capital 872,204 732,727
Accumulated other comprehensive loss 16 (3)
Accumulated deficit (642,082) (490,271)
Total stockholders' equity 230,628 242,877
Total liabilities and stockholders' equity $ 312,501 $ 332,130