Document and Entity Information - USD ($)	3 Months Ended
	Mar. 31, 2018	May 11, 2018
Document And Entity Information
Entity Registrant Name	CPS TECHNOLOGIES CORP/DE/
Entity Central Index Key	0000814676
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-29
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		$ 11,000,000
Entity Common Stock, Shares Outstanding		13,203,436
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2018