Note 1 - Organization	12 Months Ended
Dec. 31, 2022
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	Note 1. ORGANIZATION FNCB Bancorp, Inc. is a registered bank holding company under the Bank Holding Company Act of 1956, incorporated under the laws of the Commonwealth of Pennsylvania in 1997. It is the parent company of FNCB Bank (the “Bank”) and the Bank’s wholly owned subsidiaries FNCB Realty Company, Inc., FNCB Realty Company I, LLC, and FNCB Realty Company II, LLC. Unless the context otherwise requires, the term “FNCB” is used to refer to FNCB Bancorp, Inc., and its subsidiaries. In certain circumstances, however, the term “FNCB” refers to FNCB Bancorp, Inc., itself. The Bank provides customary retail and commercial banking services to individuals, businesses and local governments and municipalities through its 16 full-service branch locations, as of December 31, 2022, within its primary market area, Northeastern Pennsylvania. FNCB Realty Company, Inc., FNCB Realty Company I, LLC, and FNCB Realty Company II, LLC, which were formed to hold real estate and/or operate businesses acquired in exchange for debt settlement or foreclosure, were inactive at December 31, 2022 and 2021. In December 2006, First National Community Statutory Trust I (“Issuing Trust”), which is wholly owned by FNCB, was formed under Delaware law to provide FNCB with an additional funding source through the issuance of pooled trust preferred securities. FNCB has adopted Accounting Standards Codification (“ASC”) 810-10, Consolidation, for the Issuing Trust. Accordingly, the Issuing Trust has not been consolidated with the accounts of FNCB, because FNCB is not the primary beneficiary of the trust.

Note 1 - Organization

12 Months Ended

Dec. 31, 2022

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

Note 1. ORGANIZATION

FNCB Bancorp, Inc. is a registered bank holding company under the Bank Holding Company Act of 1956, incorporated under the laws of the Commonwealth of Pennsylvania in 1997. It is the parent company of FNCB Bank (the “Bank”) and the Bank’s wholly owned subsidiaries FNCB Realty Company, Inc., FNCB Realty Company I, LLC, and FNCB Realty Company II, LLC. Unless the context otherwise requires, the term “FNCB” is used to refer to FNCB Bancorp, Inc., and its subsidiaries. In certain circumstances, however, the term “FNCB” refers to FNCB Bancorp, Inc., itself.

The Bank provides customary retail and commercial banking services to individuals, businesses and local governments and municipalities through its 16 full-service branch locations, as of December 31, 2022, within its primary market area, Northeastern Pennsylvania.

FNCB Realty Company, Inc., FNCB Realty Company I, LLC, and FNCB Realty Company II, LLC, which were formed to hold real estate and/or operate businesses acquired in exchange for debt settlement or foreclosure, were inactive at December 31, 2022 and 2021.

In December 2006, First National Community Statutory Trust I (“Issuing Trust”), which is wholly owned by FNCB, was formed under Delaware law to provide FNCB with an additional funding source through the issuance of pooled trust preferred securities. FNCB has adopted Accounting Standards Codification (“ASC”) 810-10, Consolidation, for the Issuing Trust. Accordingly, the Issuing Trust has not been consolidated with the accounts of FNCB, because FNCB is not the primary beneficiary of the trust.