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Subsequent Event	12 Months Ended
	Dec. 31, 2012
Subsequent Events [Abstract]
Subsequent Event	Subsequent Events On January 31, 2013, as a result of the restructuring program to reduce overall corporate expenses, the Company entered into an amended lease for its Sunnyvale facility to reduce the space by approximately 31,000 square feet to 125,000 square feet. Pursuant to the terms of this amendment, the Company will pay approximately $1.4 million for termination fees and broker fees for reducing the size of the facility. In February 2013, the Company signed a patent license agreement with LSI. This agreement allows LSI to include Rambus patented innovations in all its products. In addition, the two companies have settled all outstanding claims, including pending disputes related to Rambus' patented innovations. This patent license agreement will terminate in 2018.

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The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

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