Document and Entity Information - USD ($)	12 Months Ended
	Dec. 29, 2018	Mar. 08, 2019
Document And Entity Information
Entity Registrant Name	CPS TECHNOLOGIES CORP/DE/
Entity Central Index Key	0000814676
Document Type	10-K
Document Period End Date	Dec. 29, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-29
Is Entity a Well-known Seasoned Issuer?	Yes
Is Entity a Voluntary Filer?	No
Is Entity's Reporting Status Current?	Yes
Is Entity Emerging Growth Company?	false
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Public Float		$ 11,000,000
Entity Common Stock, Shares Outstanding		13,205,936
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2018
Entity Shell Company	false