Note 3 - Investment Securities Available For Sale - Amortized Cost and Estimated Fair Value of Investment Securities (Details) - USD ($)
$ in Thousands |
Sep. 30, 2016 |
Dec. 31, 2015 |
| US Government-sponsored Enterprises Debt Securities [Member] |
|
|
| Investment securities available for sale, amortized cost |
$ 1,997
|
$ 1,994
|
| Investment securities available for sale, gross unrealized gains |
3
|
|
| Investment securities available for sale, gross unrealized losses |
|
(17)
|
| Investment securities |
2,000
|
1,977
|
| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |
|
|
| Investment securities available for sale, amortized cost |
72,432
|
72,965
|
| Investment securities available for sale, gross unrealized gains |
896
|
56
|
| Investment securities available for sale, gross unrealized losses |
(28)
|
(651)
|
| Investment securities |
73,300
|
72,370
|
| US States and Political Subdivisions Debt Securities [Member] |
|
|
| Investment securities available for sale, amortized cost |
24,386
|
21,817
|
| Investment securities available for sale, gross unrealized gains |
933
|
548
|
| Investment securities available for sale, gross unrealized losses |
(1)
|
(8)
|
| Investment securities |
25,318
|
22,357
|
| Investment securities available for sale, amortized cost |
98,815
|
96,776
|
| Investment securities available for sale, gross unrealized gains |
1,832
|
604
|
| Investment securities available for sale, gross unrealized losses |
(29)
|
(676)
|
| Investment securities |
$ 100,618
|
$ 96,704
|