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Consolidated Balance Sheets - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Current assets:    
Cash and cash equivalents $ 187.1 $ 112.3
Debt securities available-for-sale (amortized cost $612.4 million at December 31, 2020 and $557.3 million at December 31, 2019) 613.9 558.2
Accounts receivable 157.1 126.6
Inventories 28.0 17.3
Other current assets 30.1 16.6
Total current assets 1,016.2 831.0
Debt securities available-for-sale (amortized cost $226.7 million at December 31, 2020 and $299.3 million at December 31, 2019) 227.1 299.7
Right-of-use assets 82.8 74.3
Equity securities 38.2 55.9
Property and equipment, net 44.6 41.9
Deferred tax assets 319.4 0.0
Restricted cash 3.2 3.2
Other long-term assets 3.2 0.0
Total assets 1,734.7 1,306.0
Current liabilities:    
Accounts payable and accrued liabilities 168.7 141.3
Convertible senior notes 0.0 408.8
Other current liabilities 17.8 15.2
Total current liabilities 186.5 565.3
Convertible senior notes 317.9 0.0
Noncurrent operating lease liabilities 94.4 86.7
Other long-term liabilities 9.7 17.1
Total liabilities 608.5 669.1
Stockholders’ equity:    
Preferred stock, $0.001 par value; 5.0 shares authorized; no shares issued and outstanding at December 31, 2020 and 2019 0.0 0.0
Common stock, $0.001 par value; 220.0 shares authorized; issued and outstanding shares were 93.5 million and 92.3 million at December 31, 2020 and 2019, respectively 0.1 0.1
Additional paid-in capital 1,849.7 1,768.1
Accumulated other comprehensive income 1.8 1.4
Accumulated deficit (725.4) (1,132.7)
Total stockholders’ equity 1,126.2 636.9
Total liabilities and stockholders’ equity $ 1,734.7 $ 1,306.0