Cover - shares	6 Months Ended
	Jun. 29, 2019	Aug. 02, 2019
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 29, 2019
Current Fiscal Year End Date	--12-28
Entity File Number	0-16088
Entity Registrant Name	CPS TECHNOLOGIES CORP/DE/
Entity Central Index Key	0000814676
Entity Tax Identification Number	04-2832509
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	111 South Worcester Street
Entity Address, City or Town	Norton
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02766
City Area Code	508
Local Phone Number	222-0614
Title of 12(b) Security	Common stock, par value 0.01
Trading Symbol	CPSH
Security Exchange Name	NASDAQ
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 Common Stock, Shares Outstanding		13,207,436
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2019