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v3.24.3

Note 6 - Earnings Per Share (Details Textual) | 9 Months Ended
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Sep. 30, 2024
Number Of Forms Of Outstanding Common Stock | 2

X
- Definition Represents the number of forms of outstanding stock awards available with the entity. + References No definition available. + Details
Name: | ovly_NumberOfFormsOfOutstandingCommonStock
Namespace Prefix: | ovly_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration