Document and Entity Information - USD ($)	9 Months Ended
	Sep. 30, 2017	Oct. 30, 2017
Document And Entity Information
Entity Registrant Name	CPS TECHNOLOGIES CORP/DE/
Entity Central Index Key	0000814676
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Amendment Flag	false
Current Fiscal Year End Date	--12-30
Is Entity a Well-known Seasoned Issuer?	No
Is Entity a Voluntary Filer?	No
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Smaller Reporting Company
Entity Public Float		$ 9,000,000
Entity Common Stock, Shares Outstanding		13,203,436
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2017