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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 187,476 $ 108,895
Available-for-sale securities 847,748 923,201
Accounts receivable, net 71,240 63,499
Contract assets 3,660 3,538
Restricted cash short-term 2,659 2,591
Prepaid expenses and other current assets 27,085 28,230
Total current assets 1,139,868 1,129,954
Property and equipment, net 135,795 123,688
Goodwill 17,167 17,167
Acquired intangible assets, net 2,100 2,800
Operating lease right-of-use assets 41,745 43,148
Deferred contract acquisition costs, noncurrent 48,982 44,176
Restricted cash 6,660 6,660
Other noncurrent assets 13,209 13,058
Total assets 1,405,526 1,380,651
Current liabilities:    
Accounts payable 20,475 14,485
Accrued expenses and other current liabilities 24,022 20,217
Accrued compensation 31,724 25,410
Operating lease liabilities 17,990 17,717
Liability for early exercise of unvested stock options 7,517 8,603
Deferred revenue 66,418 54,945
Total current liabilities 168,146 141,377
Convertible senior notes, net 392,246 383,275
Operating lease liabilities, noncurrent 25,627 27,309
Deferred revenue, noncurrent 5,064 1,891
Other noncurrent liabilities 10,403 9,859
Total liabilities 601,486 563,711
Commitments and contingencies (Note 8)
Stockholders’ Equity:    
Additional paid-in capital 1,264,182 1,236,993
Accumulated deficit (460,483) (420,520)
Accumulated other comprehensive income 34 163
Total stockholders’ equity 804,040 816,940
Total liabilities and stockholders’ equity 1,405,526 1,380,651
Class A common stock    
Stockholders’ Equity:    
Common stock 256 249
Class B common stock    
Stockholders’ Equity:    
Common stock $ 51 $ 55