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Stockholders' Equity, Stock Plans (Details)
1 Months Ended 12 Months Ended
Jun. 30, 2009
shares
Dec. 31, 2021
Officer
$ / shares
shares
Jun. 30, 2021
shares
Dec. 31, 2020
shares
Jun. 30, 2020
shares
Jun. 30, 2019
shares
May 31, 2017
shares
Jun. 30, 2015
shares
May 31, 2015
shares
Stock Options [Member]                  
Stock Plans [Abstract]                  
Number of options outstanding (in shares)   14,089,000   12,439,000          
Number of options exercisable (in shares)   9,175,000              
1989 Stock Option Plan [Member]                  
Stock Plans [Abstract]                  
Number of shares authorized for issuance under the Plan (in shares)   20,000,000.0              
Number of options outstanding (in shares)   28,000              
Number of options exercisable (in shares)   28,000              
Number of shares available for grant (in shares)   49,000              
1989 Stock Option Plan [Member] | Stock Options [Member]                  
Stock Plans [Abstract]                  
Vesting period   4 years              
Award term   7 years              
1989 Stock Option Plan [Member] | Stock Options [Member] | One Year from Date of Grant [Member]                  
Stock Plans [Abstract]                  
Vesting percentage   25.00%              
Period before options are exercisable   1 year              
2011 Equity Incentive Plan [Member]                  
Stock Plans [Abstract]                  
Number of shares authorized for issuance under the Plan (in shares)     29,700,000     23,000,000.0 16,000,000.0 11,000,000.0 5,500,000
Reduction in fungible share reserve for each share issued pursuant to full value award (n shares)     (1.7)            
Increase in fungible share reserve for each share returning from a full value award (in shares)     1.7            
Number of options outstanding (in shares)   12,800,000              
Number of options exercisable (in shares)   8,300,000              
Number of shares available for grant (in shares)   8,500,000              
Number of executive officers terminated before change in control when vesting will accelerate for executive officers | Officer   1              
Period before change in control when vesting will accelerate for executive officers   3 months              
Period after change in control when vesting will accelerate for executive officers   12 months              
2011 Equity Incentive Plan [Member] | Stock Options [Member]                  
Stock Plans [Abstract]                  
Vesting period   4 years              
Award term   7 years              
2011 Equity Incentive Plan [Member] | Stock Options [Member] | Issued after December 31, 2021 [Member]                  
Stock Plans [Abstract]                  
Vesting period   10 years              
2011 Equity Incentive Plan [Member] | Stock Options [Member] | One Year from Date of Grant [Member]                  
Stock Plans [Abstract]                  
Vesting percentage   25.00%              
Period before options are exercisable   1 year              
2011 Equity Incentive Plan [Member] | Restricted Stock Units [Member]                  
Stock Plans [Abstract]                  
Vesting period   4 years              
Number of awards outstanding (in shares)   2,500,000              
2020 Equity Incentive Plan [Member]                  
Stock Plans [Abstract]                  
Number of shares authorized for issuance under the Plan (in shares)     1,600,000 2,600,000          
Number of options outstanding (in shares)   200,000              
Number of options exercisable (in shares)   0              
Number of shares available for grant (in shares)   1,300,000              
2020 Equity Incentive Plan [Member] | Stock Options [Member]                  
Stock Plans [Abstract]                  
Vesting period   4 years              
Award term   7 years              
2020 Equity Incentive Plan [Member] | Stock Options [Member] | Issued after December 31, 2021 [Member]                  
Stock Plans [Abstract]                  
Vesting period   10 years              
2020 Equity Incentive Plan [Member] | Stock Options [Member] | One Year from Date of Grant [Member]                  
Stock Plans [Abstract]                  
Vesting percentage   25.00%              
Period before options are exercisable   1 year              
2020 Equity Incentive Plan [Member] | Restricted Stock Units [Member]                  
Stock Plans [Abstract]                  
Vesting period   4 years              
Number of awards outstanding (in shares)   100,000              
2002 Non-Employee Directors' Stock Option Plan [Member]                  
Stock Plans [Abstract]                  
Number of shares authorized for issuance under the Plan (in shares)         2,800,000     2,000,000.0 1,200,000
Number of options outstanding (in shares)   1,000,000.0              
Number of options exercisable (in shares)   800,000              
Number of shares available for grant (in shares)   700,000              
2002 Non-Employee Directors' Stock Option Plan [Member] | Stock Options [Member]                  
Stock Plans [Abstract]                  
Award term   10 years              
2002 Non-Employee Directors' Stock Option Plan [Member] | Restricted Stock Units [Member]                  
Stock Plans [Abstract]                  
Number of awards outstanding (in shares)   100,000              
Employee Stock Purchase Plan [Member]                  
Stock Plans [Abstract]                  
Number of shares authorized for issuance under the Plan (in shares)   3,200,000              
Number of additional shares reserved for issuance (in shares) 150,000 150,000              
Maximum percentage of employee compensation used to purchase shares   10.00%              
Percentage of fair market value used to determine purchase price of stock   85.00%              
Holding period for purchased stock   6 months              
Shares purchased and issued under ESPP (in shares)   70,000.00              
Weighted average purchase price (in dollars per share) | $ / shares   $ 39.26              
Shares available for purchase under ESPP (in shares)   600,000