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Pay vs Performance Disclosure - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Pay vs Performance Disclosure        
Pay vs Performance Disclosure, Table
Pay Versus Performance Table
 
                           
Value of initial fixed $100
Investment(2)
              
Year
  
Reported
Summary
Compensation
Table Total
for PEO
    
Compensation
Actually Paid to
PEO(5)
    
Average
Reported
Summary
Compensation
Table Total for
Non-PEO NEOs(1)
    
Average
Compensation
Actually Paid to
other NEOs(1)(5)
    
Company
Total
Shareholder
Return
    
Peer Group
Total

Shareholder
Return(3)
    
Net Income
(in millions)
    
PF Op Income
(in millions)(4)
  
2023
   $ 8,423,593     $ 30,372,331     $ 3,036,107     $ 11,493,108     $ 495.46     $ 277.14     $ 333.9     $ 251.9  
2022
   $ 7,130,474     $ 19,432,713     $ 3,160,306     $ 5,746,805     $ 260.04     $ 137.05     $ (14.3 )    $ 256.2  
2021
   $ 5,761,497     $ 13,591,885     $ 1,538,175     $ 1,940,042     $ 213.36     $ 219.49     $ 18.3     $ 210.5  
2020
   $ 5,377,663     $ 6,454,443     $ 2,291,740     $ 2,827,485     $ 126.75     $ 145.23     $ (40.5 )    $ 181.8  
 
(1)
The NEOs for each applicable year are:
 
  •  
2023: PEO: Luc Seraphin. Other NEOs: Desmond Lynch, Sean Fan, and John Shinn.
 
  •  
2022: PEO: Luc Seraphin. Other NEOs: Desmond Lynch, Sean Fan, John Shinn, and Keith Jones. Mr. Jones resigned from his position as Vice President, Finance, and Interim Chief Financial Officer effective as of August 5, 2022
 
  •  
2021: PEO: Luc Seraphin. Other NEOs: Sean Fan, John Shinn, Keith Jones, Jae Kim, and Rahul Mathur. Mr. Kim resigned from his position as Senior Vice President, General Counsel and Secretary effective as of February 19, 2021. Mr. Mathur resigned from his position of Senior Vice President, Finance and Chief Financial Officer effective as of November 15, 2021
 
  •  
2020: PEO: Luc Seraphin. Other NEOs: Sean Fan, Jae Kim, and Rahul Mathur
 
(2)
Cumulative TSR is measured as of a base period of December 31, 2019
(3)
The peer group used for relative TSR is the RDG Semiconductor Composite Index, comprising 77 constituent companies, which is the same peer group the Company uses for its Item 201(e) of Regulation
S-K
disclosure
(4)
The Company-selected measure
is 
pro-forma operating
income, as described in our CD&A section of the
proxy. Pro-forma operating
income is
a non-GAAP measure
that consists of GAAP operating income, adjusted for stock-based compensation expense, amortization expense, certain acquisition related expenses, retention bonuses, restructuring expenses, impairment
charges, non-cash interest
expense and certain
other one-time or
extraordinary expenses or credits and, as described in the CD&A section of the proxy, was also adjusted for Customer Licensing Income.
 
 
Other one-time or
extraordinary expense or income items may be excluded
from pro-forma operating
income as determined by the Compensation and Human Resources Committee.
(5)
The SEC rules require that certain adjustments be made to the Summary Compensation Table totals to determine CAP, as reported in the Pay versus Performance table above. The following table details the applicable adjustments that were made to determine CAP (a
djustments for pension or dividend payments are not covered, as Rambus does not have supplemental executive retirement plans and does not pay dividends on equity award
s, and d
ue to rounding, the calculated final value of the numbers shown in the following table may not be the precise values reported above
):
 
             
Equity Awards
  
Year
  
Executives
  
SCT Total
    
Deduct SCT
Stock & Option
Awards
    
Add Year-End

Value of
Unvested Equity
Granted in Year
    
Add Change in
Value of
Unvested
Awards Granted
in Prior Years
    
Add Change
in Value of
Vested Equity
Granted in
Year
    
Add Change in
Value of Vested
Equity Granted
in Prior Years
  
2023
   PEO   $ 8,423,593     $ 7,190,089     $ 11,012,250     $ 10,245,511     $ 0     $ 7,881,066  
  Other NEOs*   $ 3,036,107     $ 2,308,102     $ 3,526,754     $ 5,965,043     $ 0     $ 1,273,305  
2022
   PEO   $ 7,130,474     $ 5,857,203     $ 8,872,767     $ 3,476,967     $ 0     $ 5,809,709  
  Other NEOs*   $ 3,160,306     $ 2,492,078     $ 4,235,555     $ 430,855     $ 0     $ 412,167  
2021
   PEO   $ 5,761,497     $ 4,511,773     $ 6,755,857     $ 3,551,346     $ 0     $ 2,034,959  
  Other NEOs*   $ 1,538,175     $ 1,055,024     $ 774,181     $ 324,841     $ 0     $ 357,869  
2020
   PEO   $ 5,377,663     $ 4,050,500     $ 4,009,500     $ 1,041,477     $ 0     $ 76,303  
  Other NEOs*   $ 2,291,740     $ 1,369,477     $ 1,377,093     $ 507,449     $ 0     $ 20,680  
 
*
Presented on an averaged basis.
     
Company Selected Measure Name pro-forma operating income      
Named Executive Officers, Footnote
 
(1)
The NEOs for each applicable year are:
 
  •  
2023: PEO: Luc Seraphin. Other NEOs: Desmond Lynch, Sean Fan, and John Shinn.
 
  •  
2022: PEO: Luc Seraphin. Other NEOs: Desmond Lynch, Sean Fan, John Shinn, and Keith Jones. Mr. Jones resigned from his position as Vice President, Finance, and Interim Chief Financial Officer effective as of August 5, 2022
 
  •  
2021: PEO: Luc Seraphin. Other NEOs: Sean Fan, John Shinn, Keith Jones, Jae Kim, and Rahul Mathur. Mr. Kim resigned from his position as Senior Vice President, General Counsel and Secretary effective as of February 19, 2021. Mr. Mathur resigned from his position of Senior Vice President, Finance and Chief Financial Officer effective as of November 15, 2021
 
  •  
2020: PEO: Luc Seraphin. Other NEOs: Sean Fan, Jae Kim, and Rahul Mathur
     
Peer Group Issuers, Footnote The peer group used for relative TSR is the RDG Semiconductor Composite Index, comprising 77 constituent companies, which is the same peer group the Company uses for its Item 201(e) of Regulation
S-K
disclosure 		     
PEO Total Compensation Amount $ 8,423,593 $ 7,130,474 $ 5,761,497 $ 5,377,663
PEO Actually Paid Compensation Amount $ 30,372,331 19,432,713 13,591,885 6,454,443
Adjustment To PEO Compensation, Footnote
(5)
The SEC rules require that certain adjustments be made to the Summary Compensation Table totals to determine CAP, as reported in the Pay versus Performance table above. The following table details the applicable adjustments that were made to determine CAP (a
djustments for pension or dividend payments are not covered, as Rambus does not have supplemental executive retirement plans and does not pay dividends on equity award
s, and d
ue to rounding, the calculated final value of the numbers shown in the following table may not be the precise values reported above
):
 
             
Equity Awards
  
Year
  
Executives
  
SCT Total
    
Deduct SCT
Stock & Option
Awards
    
Add Year-End

Value of
Unvested Equity
Granted in Year
    
Add Change in
Value of
Unvested
Awards Granted
in Prior Years
    
Add Change
in Value of
Vested Equity
Granted in
Year
    
Add Change in
Value of Vested
Equity Granted
in Prior Years
  
2023
   PEO   $ 8,423,593     $ 7,190,089     $ 11,012,250     $ 10,245,511     $ 0     $ 7,881,066  
  Other NEOs*   $ 3,036,107     $ 2,308,102     $ 3,526,754     $ 5,965,043     $ 0     $ 1,273,305  
2022
   PEO   $ 7,130,474     $ 5,857,203     $ 8,872,767     $ 3,476,967     $ 0     $ 5,809,709  
  Other NEOs*   $ 3,160,306     $ 2,492,078     $ 4,235,555     $ 430,855     $ 0     $ 412,167  
2021
   PEO   $ 5,761,497     $ 4,511,773     $ 6,755,857     $ 3,551,346     $ 0     $ 2,034,959  
  Other NEOs*   $ 1,538,175     $ 1,055,024     $ 774,181     $ 324,841     $ 0     $ 357,869  
2020
   PEO   $ 5,377,663     $ 4,050,500     $ 4,009,500     $ 1,041,477     $ 0     $ 76,303  
  Other NEOs*   $ 2,291,740     $ 1,369,477     $ 1,377,093     $ 507,449     $ 0     $ 20,680  
 
*
Presented on an averaged basis.
     
Non-PEO NEO Average Total Compensation Amount $ 3,036,107 3,160,306 1,538,175 2,291,740
Non-PEO NEO Average Compensation Actually Paid Amount $ 11,493,108 5,746,805 1,940,042 2,827,485
Adjustment to Non-PEO NEO Compensation Footnote
(5)
The SEC rules require that certain adjustments be made to the Summary Compensation Table totals to determine CAP, as reported in the Pay versus Performance table above. The following table details the applicable adjustments that were made to determine CAP (a
djustments for pension or dividend payments are not covered, as Rambus does not have supplemental executive retirement plans and does not pay dividends on equity award
s, and d
ue to rounding, the calculated final value of the numbers shown in the following table may not be the precise values reported above
):
 
             
Equity Awards
  
Year
  
Executives
  
SCT Total
    
Deduct SCT
Stock & Option
Awards
    
Add Year-End

Value of
Unvested Equity
Granted in Year
    
Add Change in
Value of
Unvested
Awards Granted
in Prior Years
    
Add Change
in Value of
Vested Equity
Granted in
Year
    
Add Change in
Value of Vested
Equity Granted
in Prior Years
  
2023
   PEO   $ 8,423,593     $ 7,190,089     $ 11,012,250     $ 10,245,511     $ 0     $ 7,881,066  
  Other NEOs*   $ 3,036,107     $ 2,308,102     $ 3,526,754     $ 5,965,043     $ 0     $ 1,273,305  
2022
   PEO   $ 7,130,474     $ 5,857,203     $ 8,872,767     $ 3,476,967     $ 0     $ 5,809,709  
  Other NEOs*   $ 3,160,306     $ 2,492,078     $ 4,235,555     $ 430,855     $ 0     $ 412,167  
2021
   PEO   $ 5,761,497     $ 4,511,773     $ 6,755,857     $ 3,551,346     $ 0     $ 2,034,959  
  Other NEOs*   $ 1,538,175     $ 1,055,024     $ 774,181     $ 324,841     $ 0     $ 357,869  
2020
   PEO   $ 5,377,663     $ 4,050,500     $ 4,009,500     $ 1,041,477     $ 0     $ 76,303  
  Other NEOs*   $ 2,291,740     $ 1,369,477     $ 1,377,093     $ 507,449     $ 0     $ 20,680  
 
*
Presented on an averaged basis.
     
Compensation Actually Paid vs. Total Shareholder Return
LOGO
     
Compensation Actually Paid vs. Net Income
LOGO
     
Compensation Actually Paid vs. Company Selected Measure
LOGO
     
Total Shareholder Return Vs Peer Group
LOGO
     
Tabular List, Table
Tabular List of Performance Measures
 
 
Pro-forma
Operating Income
 
Relative TSR
 
Product Revenue
      
Total Shareholder Return Amount $ 495.46 260.04 213.36 126.75
Peer Group Total Shareholder Return Amount 277.14 137.05 219.49 145.23
Net Income (Loss) $ 333,900,000 $ (14,300,000) $ 18,300,000 $ (40,500,000)
Company Selected Measure Amount 251,900,000 256,200,000 210,500,000 181,800,000
PEO Name Luc Seraphin Luc Seraphin Luc Seraphin Luc Seraphin
Measure:: 1        
Pay vs Performance Disclosure        
Name Pro-forma Operating Income      
Non-GAAP Measure Description
(4)
The Company-selected measure
is 
pro-forma operating
income, as described in our CD&A section of the
proxy. Pro-forma operating
income is
a non-GAAP measure
that consists of GAAP operating income, adjusted for stock-based compensation expense, amortization expense, certain acquisition related expenses, retention bonuses, restructuring expenses, impairment
charges, non-cash interest
expense and certain
other one-time or
extraordinary expenses or credits and, as described in the CD&A section of the proxy, was also adjusted for Customer Licensing Income.
     
Measure:: 2        
Pay vs Performance Disclosure        
Name Relative TSR      
Measure:: 3        
Pay vs Performance Disclosure        
Name Product Revenue      
PEO | SCT Stock & Option Awards [Member]        
Pay vs Performance Disclosure        
Adjustment to Compensation, Amount $ 7,190,089 $ 5,857,203 $ 4,511,773 $ 4,050,500
PEO | Add Year-End Value of Unvested Equity Granted in Year [Member]        
Pay vs Performance Disclosure        
Adjustment to Compensation, Amount 11,012,250 8,872,767 6,755,857 4,009,500
PEO | Add Change in Value of Unvested Awards Granted in Prior Years [Member]        
Pay vs Performance Disclosure        
Adjustment to Compensation, Amount 10,245,511 3,476,967 3,551,346 1,041,477
PEO | Add Change in Value of Vested Equity Granted in Year [Member]        
Pay vs Performance Disclosure        
Adjustment to Compensation, Amount 0 0 0 0
PEO | Add Change in Value of Vested Equity Granted in Prior Years [Member]        
Pay vs Performance Disclosure        
Adjustment to Compensation, Amount 7,881,066 5,809,709 2,034,959 76,303
Non-PEO NEO | SCT Stock & Option Awards [Member]        
Pay vs Performance Disclosure        
Adjustment to Compensation, Amount 2,308,102 2,492,078 1,055,024 1,369,477
Non-PEO NEO | Add Year-End Value of Unvested Equity Granted in Year [Member]        
Pay vs Performance Disclosure        
Adjustment to Compensation, Amount 3,526,754 4,235,555 774,181 1,377,093
Non-PEO NEO | Add Change in Value of Unvested Awards Granted in Prior Years [Member]        
Pay vs Performance Disclosure        
Adjustment to Compensation, Amount 5,965,043 430,855 324,841 507,449
Non-PEO NEO | Add Change in Value of Vested Equity Granted in Year [Member]        
Pay vs Performance Disclosure        
Adjustment to Compensation, Amount 0 0 0 0
Non-PEO NEO | Add Change in Value of Vested Equity Granted in Prior Years [Member]        
Pay vs Performance Disclosure        
Adjustment to Compensation, Amount $ 1,273,305 $ 412,167 $ 357,869 $ 20,680