XML 39 R28.htm IDEA: XBRL DOCUMENT v3.20.2
Stockholders' Equity (Tables)
 6 Months Ended
Jun. 30, 2020
Stockholders' Equity Note [Abstract]  
Stock-based Compensation Expense The stock-based compensation related to our stock-based awards and employee stock purchase plans for the three and six months ended June 30, 2020 and 2019 is as follows (in thousands): 
 Three Months Ended
June 30, 		Six Months Ended
June 30,
 2020201920202019
Cost of net revenues$891  $1,278  $2,238  $2,390  
Selling, general and administrative20,203  18,037  38,333  34,927  
Research and development3,913  3,152  7,363  6,194  
Total stock-based compensation$25,007  $22,467  $47,934  $43,511  
Summary Of Restricted Stock Units A summary for the six months ended June 30, 2020 is as follows:
Number of Shares
Underlying RSUs
(in thousands)
Weighted Average Grant Date Fair ValueWeighted Average Remaining
Contractual Term (in years)
Aggregate
Intrinsic
 Value
(in thousands)
Unvested as of December 31, 2019696  $190.60  
Granted
289  264.97  
Vested and released(288) 149.86  
Forfeited(22) 231.28  
Unvested as of June 30, 2020675  $238.47  1.6$185,207  
Summary Of Market-performance Based Restricted Stock Units
A summary for the six months ended June 30, 2020 is as follows: 
Number of Shares
Underlying MSUs
(in thousands)
Weighted Average Grant Date Fair Value
Weighted Average
Remaining
Contractual Term (in years)
Aggregate
Intrinsic 
Value
(in thousands)
Unvested as of December 31, 2019244  $331.35  
Granted156  242.04  
Vested and released(173) 120.39  
Unvested as of June 30, 2020227  $430.50  1.6$62,365  
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions The fair value of the option component of the 2010 Purchase Plan shares was estimated at the grant date using the Black-Scholes option pricing model with the following weighted average assumptions:
 Six Months Ended
June 30,
 20202019
Expected term (in years)1.01.4
Expected volatility41.7 %48.6 %
Risk-free interest rate1.5 %2.5 %
Expected dividends—  —  
Weighted average fair value at grant date$80.54  $90.36