Note 11 - Regulatory Restrictions (Tables)

6 Months Ended

Jun. 30, 2018

Banking And Thrift [Abstract]

Capital Ratios and Regulatory Minimum Requirements

	Capital levels
	Actual					Adequately capitalized					Well capitalized
As of June 30, 2018	Amount		Ratio			Amount		Ratio			Amount		Ratio
Total risk-based capital (to risk-weighted assets):
Consolidated	$	115,662		12.70	%	$	72,861		8.00	%	$	91,077		10.00	%
Bank		106,129		12.03			70,572	8.00				88,215	10.00
Tier I capital (to risk-weighted assets):
Consolidated		107,397		11.79			54,646	6.00				54,646	6.00
Bank		97,864		11.09			52,929	6.00				70,572	8.00
Common equity tier 1 capital (to risk-weighted    assets):
Consolidated		107,397		11.79			40,985	4.50			N/A		N/A
Bank		97,864		11.09			39,697	4.50				57,339	6.50
Tier I capital (to average assets):
Consolidated		107,397		9.20			46,655	4.00			N/A		N/A
Bank		97,864		8.46			46,262	4.00				57,827	5.00

	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