Note 4 - Loans and the Allowance for Loan Losses - Impaired Loans (Details) - USD ($)
|
9 Months Ended |
12 Months Ended |
Sep. 30, 2016 |
Sep. 30, 2015 |
Dec. 31, 2015 |
| Commercial Portfolio Segment [Member] | Commercial Loans [Member] |
|
|
|
| Impaired Financing Receivable, with No Related Allowance, Recorded Investment |
|
|
$ 47,000
|
| Unpaid principal balance with no related allowance recorded |
|
|
47,000
|
| Average recorded investment with no related allowance recorded |
|
|
39,000
|
| Interest income recognized with no related allowance recorded |
|
|
1,000
|
| Impaired Financing Receivable, with Related Allowance, Recorded Investment |
16,000
|
|
26,000
|
| Unpaid principal balance with allowance |
16,000
|
|
26,000
|
| Impaired Financing Receivable, Related Allowance |
2,000
|
|
26,000
|
| Average recorded investment with an allowance |
16,000
|
|
29,000
|
| Interest income recognized with an allowance |
1,000
|
|
|
| Impaired Financing Receivable, Recorded Investment |
16,000
|
|
73,000
|
| Unpaid principal balance |
16,000
|
|
73,000
|
| Impaired Financing Receivable, Average Recorded Investment |
16,000
|
|
68,000
|
| Impaired Financing Receivable, Interest Income, Accrual Method |
1,000
|
|
1,000
|
| Commercial Portfolio Segment [Member] | Agricultural Loans [Member] |
|
|
|
| Impaired Financing Receivable, with No Related Allowance, Recorded Investment |
257,000
|
|
260,000
|
| Unpaid principal balance with no related allowance recorded |
257,000
|
|
260,000
|
| Average recorded investment with no related allowance recorded |
259,000
|
|
262,000
|
| Interest income recognized with no related allowance recorded |
15,000
|
|
20,000
|
| Impaired Financing Receivable, with Related Allowance, Recorded Investment |
|
|
|
| Unpaid principal balance with allowance |
|
|
|
| Impaired Financing Receivable, Related Allowance |
|
|
|
| Average recorded investment with an allowance |
|
|
|
| Interest income recognized with an allowance |
|
|
|
| Impaired Financing Receivable, Recorded Investment |
257,000
|
|
260,000
|
| Unpaid principal balance |
257,000
|
|
260,000
|
| Impaired Financing Receivable, Average Recorded Investment |
259,000
|
|
262,000
|
| Impaired Financing Receivable, Interest Income, Accrual Method |
15,000
|
|
20,000
|
| Commercial Portfolio Segment [Member] | Real Estate Loan [Member] |
|
|
|
| Impaired Financing Receivable, with No Related Allowance, Recorded Investment |
1,985,000
|
|
1,976,000
|
| Unpaid principal balance with no related allowance recorded |
2,422,000
|
|
2,622,000
|
| Average recorded investment with no related allowance recorded |
1,806,000
|
|
2,057,000
|
| Interest income recognized with no related allowance recorded |
18,000
|
|
|
| Impaired Financing Receivable, with Related Allowance, Recorded Investment |
603,000
|
|
1,154,000
|
| Unpaid principal balance with allowance |
811,000
|
|
1,154,000
|
| Impaired Financing Receivable, Related Allowance |
152,000
|
|
371,000
|
| Average recorded investment with an allowance |
542,000
|
|
1,203,000
|
| Interest income recognized with an allowance |
|
|
|
| Impaired Financing Receivable, Recorded Investment |
2,588,000
|
|
3,130,000
|
| Unpaid principal balance |
3,233,000
|
|
3,776,000
|
| Impaired Financing Receivable, Average Recorded Investment |
2,348,000
|
|
3,260,000
|
| Impaired Financing Receivable, Interest Income, Accrual Method |
18,000
|
|
|
| Commercial Portfolio Segment [Member] | Construction Loans [Member] |
|
|
|
| Impaired Financing Receivable, with No Related Allowance, Recorded Investment |
204,000
|
|
221,000
|
| Unpaid principal balance with no related allowance recorded |
204,000
|
|
221,000
|
| Average recorded investment with no related allowance recorded |
213,000
|
|
232,000
|
| Interest income recognized with no related allowance recorded |
|
|
|
| Impaired Financing Receivable, with Related Allowance, Recorded Investment |
709,000
|
|
808,000
|
| Unpaid principal balance with allowance |
709,000
|
|
808,000
|
| Impaired Financing Receivable, Related Allowance |
248,000
|
|
269,000
|
| Average recorded investment with an allowance |
726,000
|
|
822,000
|
| Interest income recognized with an allowance |
6,000
|
|
8,000
|
| Impaired Financing Receivable, Recorded Investment |
913,000
|
|
1,029,000
|
| Unpaid principal balance |
913,000
|
|
1,029,000
|
| Impaired Financing Receivable, Average Recorded Investment |
939,000
|
|
1,054,000
|
| Impaired Financing Receivable, Interest Income, Accrual Method |
6,000
|
|
8,000
|
| Residential Portfolio Segment [Member] | Real Estate Loan [Member] |
|
|
|
| Impaired Financing Receivable, with No Related Allowance, Recorded Investment |
1,390,000
|
|
1,347,000
|
| Unpaid principal balance with no related allowance recorded |
1,401,000
|
|
1,359,000
|
| Average recorded investment with no related allowance recorded |
1,334,000
|
|
1,346,000
|
| Interest income recognized with no related allowance recorded |
57,000
|
|
79,000
|
| Impaired Financing Receivable, with Related Allowance, Recorded Investment |
242,000
|
|
245,000
|
| Unpaid principal balance with allowance |
242,000
|
|
245,000
|
| Impaired Financing Receivable, Related Allowance |
53,000
|
|
54,000
|
| Average recorded investment with an allowance |
243,000
|
|
246,000
|
| Interest income recognized with an allowance |
8,000
|
|
11,000
|
| Impaired Financing Receivable, Recorded Investment |
1,632,000
|
|
1,592,000
|
| Unpaid principal balance |
1,643,000
|
|
1,604,000
|
| Impaired Financing Receivable, Average Recorded Investment |
1,577,000
|
|
1,592,000
|
| Impaired Financing Receivable, Interest Income, Accrual Method |
65,000
|
|
90,000
|
| Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] |
|
|
|
| Impaired Financing Receivable, with No Related Allowance, Recorded Investment |
197,000
|
|
199,000
|
| Unpaid principal balance with no related allowance recorded |
197,000
|
|
199,000
|
| Average recorded investment with no related allowance recorded |
94,000
|
|
156,000
|
| Interest income recognized with no related allowance recorded |
|
|
|
| Impaired Financing Receivable, with Related Allowance, Recorded Investment |
108,000
|
|
113,000
|
| Unpaid principal balance with allowance |
108,000
|
|
113,000
|
| Impaired Financing Receivable, Related Allowance |
25,000
|
|
31,000
|
| Average recorded investment with an allowance |
111,000
|
|
115,000
|
| Interest income recognized with an allowance |
|
|
|
| Impaired Financing Receivable, Recorded Investment |
305,000
|
|
312,000
|
| Unpaid principal balance |
305,000
|
|
312,000
|
| Impaired Financing Receivable, Average Recorded Investment |
205,000
|
|
271,000
|
| Impaired Financing Receivable, Interest Income, Accrual Method |
|
|
|
| Consumer Portfolio Segment [Member] | Automobile Loan [Member] |
|
|
|
| Impaired Financing Receivable, with No Related Allowance, Recorded Investment |
121,000
|
|
65,000
|
| Unpaid principal balance with no related allowance recorded |
121,000
|
|
65,000
|
| Average recorded investment with no related allowance recorded |
54,000
|
|
21,000
|
| Interest income recognized with no related allowance recorded |
|
|
|
| Impaired Financing Receivable, with Related Allowance, Recorded Investment |
|
|
|
| Unpaid principal balance with allowance |
|
|
|
| Impaired Financing Receivable, Related Allowance |
|
|
|
| Average recorded investment with an allowance |
|
|
|
| Interest income recognized with an allowance |
|
|
|
| Impaired Financing Receivable, Recorded Investment |
121,000
|
|
65,000
|
| Unpaid principal balance |
121,000
|
|
65,000
|
| Impaired Financing Receivable, Average Recorded Investment |
54,000
|
|
21,000
|
| Impaired Financing Receivable, Interest Income, Accrual Method |
|
|
|
| Consumer Portfolio Segment [Member] | Other Loans [Member] |
|
|
|
| Impaired Financing Receivable, with No Related Allowance, Recorded Investment |
|
|
|
| Unpaid principal balance with no related allowance recorded |
|
|
|
| Average recorded investment with no related allowance recorded |
|
|
|
| Interest income recognized with no related allowance recorded |
|
|
|
| Impaired Financing Receivable, with Related Allowance, Recorded Investment |
|
|
|
| Unpaid principal balance with allowance |
|
|
|
| Impaired Financing Receivable, Related Allowance |
|
|
|
| Average recorded investment with an allowance |
|
|
|
| Interest income recognized with an allowance |
|
|
|
| Impaired Financing Receivable, Recorded Investment |
|
|
|
| Unpaid principal balance |
|
|
|
| Impaired Financing Receivable, Average Recorded Investment |
|
|
|
| Impaired Financing Receivable, Interest Income, Accrual Method |
|
|
|
| Impaired Financing Receivable, with No Related Allowance, Recorded Investment |
4,153,000
|
|
4,115,000
|
| Impaired Financing Receivable, with Related Allowance, Recorded Investment |
1,678,000
|
|
2,346,000
|
| Impaired Financing Receivable, Related Allowance |
480,000
|
|
751,000
|
| Impaired Financing Receivable, Recorded Investment |
5,832,000
|
|
6,461,000
|
| Unpaid principal balance |
6,488,000
|
|
7,119,000
|
| Impaired Financing Receivable, Average Recorded Investment |
5,398,000
|
$ 6,892,000
|
6,528,000
|
| Impaired Financing Receivable, Interest Income, Accrual Method |
$ 105,000
|
$ 89,000
|
$ 119,000
|