Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Mar. 18, 2021	Jun. 30, 2020
Document and Entity Information [Abstract]
Document Type	10-K
Document Annual Report	true
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	001-39090
Entity Registrant Name	PROVIDENT BANCORP, INC
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	84-4132422
Entity Address, Address Line One	5 Market Street
Entity Address, City or Town	Amesbury
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01913
City Area Code	978
Local Phone Number	834-8555
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	PVBC
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
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
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 134.4
Entity Common Stock, Shares Outstanding		19,014,660
Documents Incorporated by Reference	Portions of the Registrant’s proxy statement for the 2021 Annual Meeting of Stockholders (Part III).
Entity Central Index Key	0001778784
Amendment Flag	false