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Consolidated Balance Sheets - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 340.8 $ 187.1
Debt securities available-for-sale (amortized cost was $370.6 and $612.4 as of December 31, 2021 and 2020, respectively) 370.5 613.9
Accounts receivable 185.5 157.1
Inventory 30.5 28.0
Other current assets 45.5 30.1
Total current assets 972.8 1,016.2
Deferred tax assets 315.1 319.4
Debt securities available-for-sale (amortized cost was $563.2 and $226.7 as of December 31, 2021 and 2020, respectively) 560.7 227.1
Right-of-use assets 97.2 82.8
Equity securities 63.7 38.2
Property and equipment, net 58.6 44.6
Other long-term assets 4.4 6.4
Total assets 2,072.5 1,734.7
Current liabilities:    
Accounts payable and accrued liabilities 225.8 168.7
Other current liabilities 20.0 17.8
Total current liabilities 245.8 186.5
Convertible senior notes 335.1 317.9
Noncurrent operating lease liabilities 105.3 94.4
Other long-term liabilities 12.3 9.7
Total liabilities 698.5 608.5
Stockholders’ equity:    
Preferred stock, $0.001 par value; 5.0 shares authorized; no shares issued and outstanding as of December 31, 2021 and 2020 0.0 0.0
Common stock, $0.001 par value; 220.0 shares authorized; 94.9 and 93.5 shares issued and outstanding as of December 31, 2021 and 2020, respectively 0.1 0.1
Additional paid-in capital 2,011.4 1,849.7
Accumulated other comprehensive (loss) income (1.7) 1.8
Accumulated deficit (635.8) (725.4)
Total stockholders’ equity 1,374.0 1,126.2
Total liabilities and stockholders’ equity $ 2,072.5 $ 1,734.7