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Note 1 - The Business of Plumas Bancorp (Details Textual)	Dec. 31, 2018
Number of Branches	11

Represents the number of branches operated by a bank.

No definition available.

Name:	plbc_NumberOfBranches
Namespace Prefix:	plbc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant