Note 19 - Regulatory Restrictions (Tables)

12 Months Ended

Dec. 31, 2017

Banking And Thrift [Abstract]

Capital Ratios and Regulatory Minimum Requirements

	Capital levels
	Actual					Adequately capitalized					Well capitalized
As of December 31, 2017	Amount		Ratio			Amount		Ratio			Amount		Ratio
Total risk-based capital (to risk-weighted assets):
Consolidated	$	110,352		12.52	%	$	70,520		8.00	%	$	88,150		10.00	%
Bank		101,040	11.67				69,277	8.00				86,596	10.00
Tier I capital (to risk-weighted assets):
Consolidated		102,438	11.62				52,890	6.00				52,890	6.00
Bank		93,126	10.75				51,957	6.00				69,277	8.00
Common equity tier 1 capital (to risk-weighted assets):
Consolidated		102,438	11.62				39,668	4.50			N/A		N/A
Bank		93,126	10.75				38,968	4.50				56,287	6.50
Tier I capital (to average assets):
Consolidated		102,438	8.88				46,149	4.00			N/A		N/A
Bank		93,126	8.14				45,761	4.00				57,201	5.00

	Capital levels
	Actual					Adequately capitalized					Well capitalized
As of December 31, 2016	Amount		Ratio			Amount		Ratio			Amount		Ratio
Total risk-based capital (to risk-weighted assets):
Consolidated	$	104,820		12.75	%	$	65,777		8.00	%	$	82,221		10.00	%
Bank		96,478	12.10				63,792	8.00				79,740	10.00
Tier I capital (to risk-weighted assets):
Consolidated		97,320	11.84				49,333	6.00				49,333	6.00
Bank		89,025	11.16				47,844	6.00				63,792	8.00
Common equity tier 1 capital (to risk-weighted assets):
Consolidated		97,320	11.84				36,999	4.50			N/A		N/A
Bank		89,025	11.16				35,883	4.50				51,831	6.50
Tier I capital (to average assets):
Consolidated		97,320	9.16				42,479	4.00			N/A		N/A
Bank		89,025	8.45				42,144	4.00				52,680	5.00