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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Current assets    
Cash and cash equivalents $ 459,794 $ 81,611
Investments 684,579 237,203
Accounts receivable 19,936 16,837
Inventory 17,985 14,230
Prepaid expenses and other current assets 6,542 4,870
Short-term restricted cash 300 836
Total current assets 1,189,136 355,587
Property and equipment, net 25,000 24,899
Operating lease right-of-use assets, net 28,580 29,951
Long-term restricted cash 3,000 3,500
Other long-term assets 65 43
Total assets 1,245,781 413,980
Current liabilities    
Accounts payable 4,761 3,579
Accrued expenses 22,907 17,350
Deferred revenue, current 9,534 8,722
Operating lease liabilities, current 4,644 4,332
Other liabilities, current 3,587 4,519
Total current liabilities 45,433 38,502
Deferred revenue, non-current 10,158 1,568
Operating lease liabilities, non-current 35,431 37,667
Convertible senior notes, net 895,762  
Other liabilities, non-current 752 752
Total liabilities 987,536 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 198,917 shares and 192,294 shares at June 30, 2021 and December 31, 2020, respectively 199 192
Additional paid-in capital 1,423,357 1,372,083
Accumulated other comprehensive income (loss) (6) 85
Accumulated deficit (1,165,305) (1,036,869)
Total stockholders' equity 258,245 335,491
Total liabilities and stockholders' equity $ 1,245,781 $ 413,980