Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 28, 2022	Jun. 30, 2021
Document and Entity Information [Abstract]
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2021
Entity File Number	1-07109
Entity Registrant Name	SERVOTRONICS INC /DE/
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	16-0837866
Entity Address, Address Line One	1110 Maple Street
Entity Address, City or Town	Elma
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	14059
City Area Code	716
Local Phone Number	655-5990
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
ICFR Auditor Attestation Flag	false
Entity Central Index Key	0000089140
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false
Trading Symbol	svt
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Title of 12(b) Security	Common Stock
Security Exchange Name	NYSE
Auditor Name	FREED MAXICK CPAs, P.C.
Auditor Firm ID	317
Auditor Location	Buffalo, New York
Entity Public Float			$ 14,176,355
Entity Common Stock, Shares Outstanding		2,491,667