Cover - USD ($)	12 Months Ended
	Dec. 26, 2020	Mar. 05, 2021
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 26, 2020
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2020
Current Fiscal Year End Date	--12-26
Entity File Number	0-16088
Entity Registrant Name	CPS TECHNOLOGIES CORP/DE/
Entity Central Index Key	0000814676
Entity Incorporation, State or Country Code	DE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float		$ 15,000,000
Entity Common Stock, Shares Outstanding		14,352,542