Note 22 - Parent Company-only Financial Statements - Condensed Statements of Income and Comprehensive Income (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest on subordinated debt		$ 1,118,000	$ 767,000	$ 360,000
Interest on senior debt		915,000	915,000	915,000
Total interest expense		18,218,000	12,378,000	6,956,000
Other operating expense		2,092,000	1,661,000	1,452,000
Loss before benefit for income taxes		(3,716,000)	4,086,000	7,022,000
Benefit for income taxes		(899,000)	890,000	2,875,000
Net income (loss)	$ (1,500,000)	(2,817,000)	3,196,000	4,147,000
Total comprehensive income		(2,394,000)	2,525,000	4,112,000
Parent Company [Member]
Interest on subordinated debt		476,000	454,000	371,000
Interest on senior debt		1,571,000	1,242,000	915,000
Total interest expense		2,047,000	1,696,000	1,286,000
Other operating expense		214,000	313,000	208,000
Loss before benefit for income taxes		2,261,000	2,009,000	1,494,000
Benefit for income taxes		(504,000)
Loss before equity in undistributed net income of subsidiary		1,757,000	2,009,000	1,494,000
Equity in undistributed net (loss) income of subsidiary		(1,060,000)	5,205,000	5,641,000
Net income (loss)		(2,817,000)	3,196,000	4,147,000
Equity in subsidiary other comprehensive income (loss), net of subsidiary		423,000	(671,000)	(35,000)
Total comprehensive income		$ (2,394,000)	$ 2,525,000	$ 4,112,000