| Document And Entity Information | Apr. 21, 2021 |
| Document Information [Line Items] | |
| Entity, Registrant Name | Plumas Bancorp |
| Document, Type | 8-K |
| Document, Period End Date | Apr. 21, 2021 |
| Entity, Incorporation, State or Country Code | CA |
| Entity, File Number | 000-49883 |
| Entity, Tax Identification Number | 75-2987096 |
| Entity, Address, Address Line One | 5525 Kietzke Lane |
| Entity, Address, Address Line Two | Suite 100 |
| Entity, Address, City or Town | Reno |
| Entity, Address, State or Province | NV |
| Entity, Address, Postal Zip Code | 89511 |
| City Area Code | 775 |
| Local Phone Number | 786-0907 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity, Emerging Growth Company | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | PLBC |
| Security Exchange Name | NASDAQ |
| Amendment Flag | false |
| Entity, Central Index Key | 0001168455 |
