Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Mar. 04, 2020	Jun. 30, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	SERVOTRONICS INC /DE/
Entity Central Index Key	0000089140
Trading Symbol	svt
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Voluntary Filers	No
Entity Common Stock, Shares Outstanding		2,477,099
Entity Well-known Seasoned Issuer	No
Entity Public Float			$ 15,269,041
Document Type	10-K
Document Period End Date	Dec. 31, 2019
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Small Business	true
Entity Emerging Growth Company	false