Note 3 - Loans Receivable - Nonperforming Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Non-accrual loans	$ 651	$ 614
Accruing loans delinquent 90 days or more	998	495
Restructured loans, net	42	43
Total nonperforming loans	1,691	1,152
Real estate and other repossessed assets acquired in settlement of loans, net	668	825
Total nonperforming assets	$ 2,359	$ 1,977
Total nonperforming assets as a percentage of total assets	0.35%	0.29%
Allowance for loan losses	$ 5,075	$ 4,770	$ 3,940	$ 3,550
Percent of allowance for loan losses to nonperforming loans	300.12%	414.06%
Percent of allowance for loan losses to nonperforming assets	215.13%	241.27%