    <SEC-DOCUMENT>0001437749-21-028543-index.html : 20211214
    <SEC-HEADER>0001437749-21-028543.hdr.sgml : 20211214
    <ACCEPTANCE-DATETIME>20211214160705
    ACCESSION NUMBER:		0001437749-21-028543
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		37
    CONFORMED PERIOD OF REPORT:	20211214
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20211214
    DATE AS OF CHANGE:		20211214

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			COHU INC
    		CENTRAL INDEX KEY:			0000021535
    		STANDARD INDUSTRIAL CLASSIFICATION:	INSTRUMENTS FOR MEAS & TESTING OF ELECTRICITY & ELEC SIGNALS [3825]
    		IRS NUMBER:				951934119
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1225

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-04298
    		FILM NUMBER:		211491060

    	BUSINESS ADDRESS:
    		STREET 1:		12367 CROSTHWAITE CIRCLE
    		CITY:			POWAY
    		STATE:			CA
    		ZIP:			92064-6817
    		BUSINESS PHONE:		858-848-8100

    	MAIL ADDRESS:
    		STREET 1:		12367 CROSTHWAITE CIRCLE
    		CITY:			POWAY
    		STATE:			CA
    		ZIP:			92064-6817

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	COHU ELECTRONICS INC
    		DATE OF NAME CHANGE:	19720809
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>cohu20211213_8k.htm
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    <TEXT>
    Document 1 - file: cohu20211213_8k.htm

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    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>ex_316201.htm
    <DESCRIPTION>EXHIBIT 99.1
    <TEXT>
    Document 2 - file: ex_316201.htm

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    <TYPE>EX-99.2
    <SEQUENCE>3
    <FILENAME>ex_316202.htm
    <DESCRIPTION>EXHIBIT 99.2
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    <TYPE>EX-101.SCH
    <SEQUENCE>4
    <FILENAME>cohu-20211214.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
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    Document 12 - file: slide04.jpg

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    Document 18 - file: slide10.jpg

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    Document 25 - file: slide17.jpg

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    <FILENAME>slide18.jpg
    <TEXT>
    Document 26 - file: slide18.jpg

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    <SEQUENCE>27
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    Document 27 - file: slide19.jpg

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    Document 28 - file: slide20.jpg

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    <FILENAME>slide21.jpg
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    <SEQUENCE>31
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    <TYPE>EXCEL
    <SEQUENCE>32
    <FILENAME>Financial_Report.xlsx
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    <TEXT>
    Document 32 - file: Financial_Report.xlsx

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    <SEQUENCE>33
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    <TEXT>
    Document 33 - file: Show.js

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    <SEQUENCE>34
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    <TEXT>
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    <SEQUENCE>35
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    Document 35 - file: FilingSummary.html

    Document 35 - RAW XML: FilingSummary.xml

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    <TYPE>JSON
    <SEQUENCE>37
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