Note 15 - Regulatory Matters/Subsequent Events (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]

	FNCB Bank					Minimum Required For Capital Adequacy Purposes			Minimum Required For Capital Adequacy Purposes with Conservation Buffer			Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations
(dollars in thousands)	Amount		Ratio			Ratio			Ratio			Ratio
December 31, 2022
Total capital (to risk-weighted assets)	$	169,984		13.11	%		8.00	%		10.50	%		10.00	%
Tier I capital (to risk-weighted assets)		154,842		11.94	%		6.00	%		8.50	%		8.00	%
Tier I common equity (to risk-weighted assets)		154,842		11.94	%		4.50	%		7.00	%		6.50	%
Tier I capital (to average assets)		154,842		8.77	%		4.00	%		4.00	%		5.00	%
Total risk-weighted assets		1,296,618
Total average assets		1,765,251

	FNCB Bank					Minimum Required For Capital Adequacy Purposes			Minimum Required For Capital Adequacy Purposes with Conservation Buffer			Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations
(dollars in thousands)	Amount		Ratio			Ratio			Ratio			Ratio
December 31, 2021
Total capital (to risk-weighted assets)	$	161,957		14.64	%		8.00	%		10.50	%		10.00	%
Tier I capital (to risk-weighted assets)		148,958		13.46	%		6.00	%		8.50	%		8.00	%
Tier I common equity (to risk-weighted assets)		148,958		13.46	%		4.50	%		7.00	%		6.50	%
Tier I capital (to average assets)		148,958		8.92	%		4.00	%		4.00	%		5.00	%
Total risk-weighted assets		1,106,636
Total average assets		1,669,932