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Document and Entity Information
Nov. 23, 2021
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Nov. 23, 2021
Entity Registrant Name MOSYS, INC.
Entity Central Index Key 0000890394
Current Fiscal Year End Date --12-31
Trading Symbol MOSY
Entity Emerging Growth Company false
Entity Address, State or Province CA
Title of 12(b) Security Common Stock, par value $0.001 per share
Security Exchange Name NASDAQ
Entity File Number 000-32929
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 77-0291941
Entity Address, Address Line One 2309 Bering Dr.
Entity Address, City or Town San Jose
Entity Address, Postal Zip Code 95131
City Area Code 408
Local Phone Number 418-7500
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false