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Document And Entity Information
 12 Months Ended
Dec. 31, 2021
Document And Entity Information [Abstract]  
Entity Registrant Name SILICOM LTD.
Entity Central Index Key 0000916793
Document Type 6-K
Amendment Flag false
Document Period End Date Dec. 31, 2021
Current Fiscal Year End Date --12-31
Entity File Number 000-23288
Entity Address, Address Line One 14 Atir Yeda St.
Entity Address, Address Line Two P.O.Box 2164
Entity Address, Address Line Three Kfar-Sava
Entity Address Country IL
Entity Address, Postal Zip Code 4464323