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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Current assets    
Cash and cash equivalents $ 932,398 $ 81,611
Investments 227,921 237,203
Accounts receivable 12,906 16,837
Inventory 16,268 14,230
Prepaid expenses and other current assets 5,623 4,870
Short-term restricted cash 836 836
Total current assets 1,195,952 355,587
Property and equipment, net 24,207 24,899
Operating lease right-of-use assets, net 29,162 29,951
Long-term restricted cash 3,500 3,500
Other long-term assets 67 43
Total assets 1,252,888 413,980
Current liabilities    
Accounts payable 3,471 3,579
Accrued expenses 14,672 17,350
Deferred revenue, current 9,607 8,722
Operating lease liabilities, current 4,448 4,332
Other liabilities, current 1,539 4,519
Total current liabilities 33,737 38,502
Deferred revenue, non-current 5,687 1,568
Operating lease liabilities, non-current 36,485 37,667
Convertible senior notes, net 895,674  
Other liabilities, non-current 752 752
Total liabilities 972,335 78,489
Commitments and contingencies
Stockholders' equity    
Preferred stock, $0.001 par value: Authorized 50,000 shares; No shares issued or outstanding
Common stock, $0.001 par value: Authorized 1,000,000 shares; issued and outstanding 198,340 shares and 192,294 shares at March 31, 2021 and December 31, 2020, respectively 198 192
Additional paid-in capital 1,404,585 1,372,083
Accumulated other comprehensive income 74 85
Accumulated deficit (1,124,304) (1,036,869)
Total stockholders' equity 280,553 335,491
Total liabilities and stockholders' equity $ 1,252,888 $ 413,980