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Retirement Savings Plan	12 Months Ended
	Dec. 31, 2011
Retirement Savings Plan
Retirement Savings Plan	Note 10: Retirement Savings Plan         Effective January 1997, the Company adopted the MoSys 401(k) Plan (the Savings Plan) which qualifies as a thrift plan under Section 401(k) of the Internal Revenue Code. Full-time and part-time employees who are at least 21 years of age are eligible to participate in the Savings Plan at the time of hire. Participants may contribute up to 15% of their earnings to the Savings Plan. Prior to the second quarter of 2009, the Company made a matching contribution on behalf of each participant in an amount equal to 25% of a participant's contributions during the plan year. The Company made matching contributions of $52,000 in 2009. No matching contributions were made in 2010 and 2011.

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The entire disclosure for pension and other postretirement benefits.

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