Note 12 - Operating Segments - Summary of Financial Information for the Reportable Segments (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Net Interest Income		$ 2,866,000	$ 2,171,000	$ 7,766,000	$ 6,406,000
Provision for Loan Losses		201,000	157,000	621,000	318,000
Net Interest Income after Provision for Loan Losses		2,665,000	2,014,000	7,145,000	6,088,000
Insurance commissions		130,000	109,000	347,000	307,000
Income from bank-owned life insurance		20,000	21,000	59,000	60,000
Net gain on loans held for sale		1,209,000	996,000	2,816,000	2,296,000
Gains (Losses) on Sales of Other Real Estate		(110,000)		(92,000)
Gain on the sale of SBA loans		19,000	98,000	71,000	238,000
Total Non-Interest Income		1,880,000	1,645,000	4,555,000	3,933,000
Salaries and employee benefits		2,145,000	1,776,000	5,908,000	5,173,000
Directors’ fees and expenses		61,000	54,000	175,000	167,000
Occupancy and equipment		251,000	181,000	673,000	515,000
Data processing		177,000	121,000	474,000	341,000
Professional fees		112,000	108,000	339,000	282,000
FDIC deposit insurance assessment		38,000		85,000	40,000
Other real estate owned expenses		11,000	12,000	34,000	23,000
Advertising		75,000	70,000	224,000	212,000
Amortization of Intangible Assets, Total		12,000	12,000	36,000	36,000
Other		259,000	200,000	714,000	579,000
Total Non-Interest Expense		3,141,000	2,535,000	8,663,000	7,369,000
Pretax Segment Profit		1,404,000	1,124,000	3,037,000	2,652,000
Segment Assets		422,303,000	293,820,000	422,303,000	293,820,000	$ 302,540,000
Mortgage Banking and Abstract Fees [Member]
Non-interest revenue		400,000	349,000	1,045,000	819,000
Real Estate Sales Commissions [Member]
Non-interest revenue		68,000	77,000	131,000	128,000
Other Fees and Services Fees [Member]
Non-interest revenue		144,000	(5,000)	178,000	85,000
Quaint Oak Bank [Member]
Net Interest Income	[1]	2,948,000	2,225,000	7,935,000	6,504,000
Provision for Loan Losses	[1]	201,000	157,000	621,000	318,000
Net Interest Income after Provision for Loan Losses	[1]	2,747,000	2,068,000	7,314,000	6,186,000
Insurance commissions	[1]	130,000	109,000	347,000	307,000
Income from bank-owned life insurance	[1]	20,000	21,000	59,000	60,000
Net gain on loans held for sale	[1]
Gains (Losses) on Sales of Other Real Estate	[1]	(110,000)		(92,000)
Gain on the sale of SBA loans	[1]	19,000	98,000	71,000	238,000
Total Non-Interest Income	[1]	521,000	481,000	1,296,000	1,260,000
Salaries and employee benefits	[1]	1,761,000	1,485,000	4,894,000	4,272,000
Directors’ fees and expenses	[1]	61,000	54,000	175,000	167,000
Occupancy and equipment	[1]	175,000	126,000	461,000	354,000
Data processing	[1]	119,000	92,000	345,000	253,000
Professional fees	[1]	95,000	96,000	287,000	244,000
FDIC deposit insurance assessment	[1]	38,000		85,000	40,000
Other real estate owned expenses	[1]	11,000	12,000	34,000	23,000
Advertising	[1]	61,000	60,000	183,000	182,000
Amortization of Intangible Assets, Total	[1]	12,000	13,000	37,000	37,000
Other	[1]	248,000	185,000	672,000	538,000
Total Non-Interest Expense	[1]	2,581,000	2,123,000	7,173,000	6,110,000
Pretax Segment Profit	[1]	687,000	426,000	1,437,000	1,336,000
Segment Assets	[1]	382,939,000	270,502,000	382,939,000	270,502,000
Quaint Oak Bank [Member] | Mortgage Banking and Abstract Fees [Member]
Non-interest revenue	[1]	250,000	181,000	602,000	442,000
Quaint Oak Bank [Member] | Real Estate Sales Commissions [Member]
Non-interest revenue	[1]	68,000	77,000	131,000	128,000
Quaint Oak Bank [Member] | Other Fees and Services Fees [Member]
Non-interest revenue	[1]	144,000	(5,000)	178,000	85,000
Quaint Oak Bank, Mortgage [Member]
Net Interest Income		(82,000)	(54,000)	(169,000)	(98,000)
Provision for Loan Losses
Net Interest Income after Provision for Loan Losses		(82,000)	(54,000)	(169,000)	(98,000)
Insurance commissions
Income from bank-owned life insurance
Net gain on loans held for sale		1,209,000	996,000	2,816,000	2,296,000
Gains (Losses) on Sales of Other Real Estate
Gain on the sale of SBA loans
Total Non-Interest Income		1,359,000	1,164,000	3,259,000	2,673,000
Salaries and employee benefits		384,000	291,000	1,014,000	901,000
Directors’ fees and expenses
Occupancy and equipment		76,000	55,000	212,000	161,000
Data processing		58,000	29,000	129,000	88,000
Professional fees		17,000	12,000	52,000	38,000
FDIC deposit insurance assessment
Other real estate owned expenses
Advertising		14,000	10,000	41,000	30,000
Amortization of Intangible Assets, Total
Other		11,000	15,000	42,000	41,000
Total Non-Interest Expense		560,000	412,000	1,490,000	1,259,000
Pretax Segment Profit		717,000	698,000	1,600,000	1,316,000
Segment Assets		39,364,000	23,318,000	39,364,000	23,318,000
Quaint Oak Bank, Mortgage [Member] | Mortgage Banking and Abstract Fees [Member]
Non-interest revenue		150,000	168,000	443,000	377,000
Quaint Oak Bank, Mortgage [Member] | Real Estate Sales Commissions [Member]
Non-interest revenue
Quaint Oak Bank, Mortgage [Member] | Other Fees and Services Fees [Member]
Non-interest revenue

[1] Includes Quaint Oak Bancorp, Inc. and the Bank's Subsidiaries, Quaint Oak Real Estate, Quaint Oak Abstract, Quaint Oak Insurance Agency, and QOB Properties.