Note 5 - Loans - Summary of Impaired Loans (Details) - USD ($)
$ in Thousands |
3 Months Ended |
6 Months Ended |
12 Months Ended |
Jun. 30, 2018 |
Jun. 30, 2018 |
Dec. 31, 2017 |
| Recorded investment, with no allowance |
$ 15,309
|
$ 15,309
|
$ 16,296
|
| Unpaid principal balance, with no allowance |
16,370
|
16,370
|
23,069
|
| Average recorded investment, with no allowance |
16,059
|
16,504
|
23,013
|
| Interest income recognized in period, with no allowance |
188
|
388
|
901
|
| Recorded investment, with an allowance |
22,666
|
22,666
|
24,214
|
| Unpaid principal balance, with an allowance |
29,489
|
29,489
|
24,795
|
| Related allowance |
5,877
|
5,877
|
5,609
|
| Average recorded investment, with an allowance |
22,801
|
23,303
|
25,727
|
| Interest income recognized in period, with an allowance |
210
|
430
|
1,059
|
| Recorded investment |
37,975
|
37,975
|
40,510
|
| Unpaid principal balance |
45,859
|
45,859
|
47,864
|
| Average recorded investment |
38,860
|
39,807
|
48,740
|
| Interest income recognized in period |
398
|
818
|
1,960
|
| Commercial Real Estate Portfolio Segment [Member] |
|
|
|
| Recorded investment, with no allowance |
4,842
|
4,842
|
10,036
|
| Unpaid principal balance, with no allowance |
5,733
|
5,733
|
16,639
|
| Average recorded investment, with no allowance |
5,257
|
5,611
|
16,417
|
| Interest income recognized in period, with no allowance |
53
|
113
|
571
|
| Recorded investment, with an allowance |
15,221
|
15,221
|
16,411
|
| Unpaid principal balance, with an allowance |
22,044
|
22,044
|
16,992
|
| Related allowance |
5,423
|
5,423
|
4,276
|
| Average recorded investment, with an allowance |
15,200
|
15,542
|
17,912
|
| Interest income recognized in period, with an allowance |
121
|
245
|
651
|
| Recorded investment |
20,063
|
20,063
|
26,447
|
| Unpaid principal balance |
27,777
|
27,777
|
33,631
|
| Average recorded investment |
20,457
|
21,153
|
34,329
|
| Interest income recognized in period |
174
|
358
|
1,222
|
| Real Estate Portfolio Segment[Member] |
|
|
|
| Recorded investment, with no allowance |
9,841
|
9,841
|
5,648
|
| Unpaid principal balance, with no allowance |
10,008
|
10,008
|
5,814
|
| Average recorded investment, with no allowance |
10,173
|
10,263
|
5,891
|
| Interest income recognized in period, with no allowance |
127
|
259
|
296
|
| Recorded investment, with an allowance |
6,399
|
6,399
|
6,756
|
| Unpaid principal balance, with an allowance |
6,399
|
6,399
|
6,756
|
| Related allowance |
285
|
285
|
1,163
|
| Average recorded investment, with an allowance |
6,555
|
6,715
|
6,776
|
| Interest income recognized in period, with an allowance |
74
|
156
|
349
|
| Recorded investment |
16,240
|
16,240
|
12,404
|
| Unpaid principal balance |
16,407
|
16,407
|
12,570
|
| Average recorded investment |
16,728
|
16,978
|
12,667
|
| Interest income recognized in period |
201
|
415
|
645
|
| Real Estate Portfolio Segment[Member] | Construction Loans [Member] |
|
|
|
| Recorded investment, with no allowance |
626
|
626
|
574
|
| Unpaid principal balance, with no allowance |
629
|
629
|
577
|
| Average recorded investment, with no allowance |
629
|
630
|
663
|
| Interest income recognized in period, with no allowance |
8
|
16
|
31
|
| Recorded investment, with an allowance |
997
|
997
|
997
|
| Unpaid principal balance, with an allowance |
997
|
997
|
997
|
| Related allowance |
120
|
120
|
120
|
| Average recorded investment, with an allowance |
997
|
997
|
997
|
| Interest income recognized in period, with an allowance |
14
|
28
|
56
|
| Recorded investment |
1,623
|
1,623
|
1,571
|
| Unpaid principal balance |
1,626
|
1,626
|
1,574
|
| Average recorded investment |
1,626
|
1,627
|
1,660
|
| Interest income recognized in period |
22
|
44
|
87
|
| Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member] |
|
|
|
| Recorded investment, with no allowance |
2,512
|
2,512
|
2,640
|
| Unpaid principal balance, with no allowance |
2,679
|
2,679
|
2,806
|
| Average recorded investment, with no allowance |
2,836
|
2,910
|
2,875
|
| Interest income recognized in period, with no allowance |
42
|
86
|
159
|
| Recorded investment, with an allowance |
3,776
|
3,776
|
3,914
|
| Unpaid principal balance, with an allowance |
3,776
|
3,776
|
3,914
|
| Related allowance |
27
|
27
|
601
|
| Average recorded investment, with an allowance |
3,775
|
3,775
|
3,801
|
| Interest income recognized in period, with an allowance |
46
|
94
|
215
|
| Recorded investment |
6,288
|
6,288
|
6,554
|
| Unpaid principal balance |
6,455
|
6,455
|
6,720
|
| Average recorded investment |
6,611
|
6,685
|
6,676
|
| Interest income recognized in period |
88
|
180
|
374
|
| Real Estate Portfolio Segment[Member] | One to Four Family [Member] |
|
|
|
| Recorded investment, with no allowance |
2,258
|
2,258
|
2,262
|
| Unpaid principal balance, with no allowance |
2,258
|
2,258
|
2,262
|
| Average recorded investment, with no allowance |
2,255
|
2,255
|
2,289
|
| Interest income recognized in period, with no allowance |
23
|
48
|
93
|
| Recorded investment, with an allowance |
1,237
|
1,237
|
980
|
| Unpaid principal balance, with an allowance |
1,237
|
1,237
|
980
|
| Related allowance |
178
|
178
|
281
|
| Average recorded investment, with an allowance |
1,240
|
1,240
|
1,113
|
| Interest income recognized in period, with an allowance |
12
|
26
|
54
|
| Recorded investment |
3,495
|
3,495
|
3,242
|
| Unpaid principal balance |
3,495
|
3,495
|
3,242
|
| Average recorded investment |
3,495
|
3,495
|
3,402
|
| Interest income recognized in period |
35
|
74
|
147
|
| Real Estate Portfolio Segment[Member] | Other Mortgages [Member] |
|
|
|
| Recorded investment, with no allowance |
5,071
|
5,071
|
746
|
| Unpaid principal balance, with no allowance |
5,071
|
5,071
|
746
|
| Average recorded investment, with no allowance |
5,082
|
5,098
|
727
|
| Interest income recognized in period, with no allowance |
62
|
125
|
44
|
| Recorded investment, with an allowance |
1,386
|
1,386
|
1,862
|
| Unpaid principal balance, with an allowance |
1,386
|
1,386
|
1,862
|
| Related allowance |
80
|
80
|
281
|
| Average recorded investment, with an allowance |
1,540
|
1,700
|
1,862
|
| Interest income recognized in period, with an allowance |
16
|
36
|
80
|
| Recorded investment |
6,457
|
6,457
|
2,608
|
| Unpaid principal balance |
6,457
|
6,457
|
2,608
|
| Average recorded investment |
6,622
|
6,798
|
2,589
|
| Interest income recognized in period |
78
|
161
|
124
|
| Consumer Portfolio Segment [Member] |
|
|
|
| Recorded investment, with no allowance |
|
|
38
|
| Unpaid principal balance, with no allowance |
|
|
39
|
| Average recorded investment, with no allowance |
|
|
42
|
| Interest income recognized in period, with no allowance |
|
|
3
|
| Recorded investment, with an allowance |
49
|
49
|
50
|
| Unpaid principal balance, with an allowance |
49
|
49
|
50
|
| Related allowance |
49
|
49
|
50
|
| Average recorded investment, with an allowance |
49
|
49
|
42
|
| Interest income recognized in period, with an allowance |
1
|
1
|
3
|
| Recorded investment |
49
|
49
|
88
|
| Unpaid principal balance |
49
|
49
|
89
|
| Average recorded investment |
49
|
49
|
84
|
| Interest income recognized in period |
$ 1
|
$ 1
|
$ 6
|