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Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Current assets:    
Cash and cash equivalents $ 530.0 $ 446.2
Short-term marketable securities 1,978.8 1,087.1
Accounts receivable, net 296.5 286.3
Inventory 165.3 119.8
Prepaid and other current assets 62.4 30.0
Total current assets 3,033.0 1,969.4
Property and equipment, net 384.3 321.3
Operating lease right-of-use assets 71.6 71.5
Goodwill 18.7 18.6
Other assets 14.2 14.2
Total assets 3,521.8 2,395.0
Current liabilities:    
Accounts payable and accrued liabilities 315.9 256.4
Accrued payroll and related expenses 67.4 88.5
Operating lease liabilities, current portion 15.1 13.6
Deferred revenue 1.7 1.7
Total current liabilities 400.1 360.2
Long-term senior convertible notes 1,658.8 1,059.7
Operating lease liabilities, net of current portion 73.7 72.4
Other long-term liabilities 35.3 20.1
Total liabilities 2,167.9 1,512.4
Commitments and contingencies
Stockholders’ equity:    
Preferred stock, $0.001 par value, 5.0 million shares authorized; no shares issued and outstanding at June 30, 2020 and December 31, 2019 0.0 0.0
Common stock, $0.001 par value, 200.0 million shares authorized; 96.2 million and 95.4 million shares issued and outstanding, respectively, at June 30, 2020; and 92.4 million and 91.6 million shares issued and outstanding, respectively, at December 31, 2019 0.1 0.1
Additional paid-in capital 2,079.8 1,675.9
Accumulated other comprehensive income 3.5 2.3
Accumulated deficit (629.5) (695.7)
Treasury stock, at cost; 0.8 million shares at June 30, 2020 and December 31, 2019 (100.0) (100.0)
Total stockholders’ equity 1,353.9 882.6
Total liabilities and stockholders’ equity $ 3,521.8 $ 2,395.0