SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Basis of Presentation (Details)	Mar. 31, 2025 Subsidiaries
BASIS OF PRESENTATION [Abstract]
Number of wholly-owned subsidiaries	1

Represents the number of wholly-owned subsidiaries.

No definition available.

Name:	ovbc_NumberOfWhollyOwnedSubsidiaries
Namespace Prefix:	ovbc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant