Note 9 - Fair Value Measurement - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands |
Sep. 30, 2016 |
Dec. 31, 2015 |
| US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |
|
|
| Investment securities |
|
|
| US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |
|
|
| Investment securities |
2,000
|
1,977
|
| US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |
|
|
| Investment securities |
|
|
| US Government-sponsored Enterprises Debt Securities [Member] |
|
|
| Investment securities |
2,000
|
1,977
|
| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Inputs, Level 1 [Member] |
|
|
| Investment securities |
|
|
| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Inputs, Level 2 [Member] |
|
|
| Investment securities |
73,300
|
72,370
|
| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Inputs, Level 3 [Member] |
|
|
| Investment securities |
|
|
| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |
|
|
| Investment securities |
73,300
|
72,370
|
| US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |
|
|
| Investment securities |
|
|
| US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |
|
|
| Investment securities |
25,318
|
22,357
|
| US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |
|
|
| Investment securities |
|
|
| US States and Political Subdivisions Debt Securities [Member] |
|
|
| Investment securities |
25,318
|
22,357
|
| Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |
|
|
| Investment securities |
|
|
| Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |
|
|
| Investment securities |
100,618
|
|
| Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |
|
|
| Investment securities |
|
|
| Corporate Debt Securities [Member] |
|
|
| Investment securities |
$ 100,618
|
|
| Fair Value, Inputs, Level 1 [Member] |
|
|
| Investment securities |
|
|
| Fair Value, Inputs, Level 2 [Member] |
|
|
| Investment securities |
|
96,704
|
| Fair Value, Inputs, Level 3 [Member] |
|
|
| Investment securities |
|
|
| Investment securities |
|
$ 96,704
|