Note 5 - Loans - Summary of Impaired Loans (Details) - USD ($)
$ in Thousands |
3 Months Ended |
9 Months Ended |
12 Months Ended |
Sep. 30, 2018 |
Sep. 30, 2018 |
Dec. 31, 2017 |
| Recorded investment, with no allowance |
$ 12,417
|
$ 12,417
|
$ 16,296
|
| Unpaid principal balance, with no allowance |
13,493
|
13,493
|
23,069
|
| Average recorded investment, with no allowance |
12,736
|
13,697
|
23,013
|
| Interest income recognized in period, with no allowance |
131
|
462
|
901
|
| Recorded investment, with an allowance |
25,316
|
25,316
|
24,214
|
| Unpaid principal balance, with an allowance |
32,735
|
32,735
|
24,795
|
| Related allowance |
6,801
|
6,801
|
5,609
|
| Average recorded investment, with an allowance |
25,830
|
26,033
|
25,727
|
| Interest income recognized in period, with an allowance |
224
|
750
|
1,059
|
| Recorded investment |
37,733
|
37,733
|
40,510
|
| Unpaid principal balance |
46,228
|
46,228
|
47,864
|
| Average recorded investment |
38,566
|
39,730
|
48,740
|
| Interest income recognized in period |
355
|
1,212
|
1,960
|
| Commercial Real Estate Portfolio Segment [Member] |
|
|
|
| Recorded investment, with no allowance |
4,611
|
4,611
|
10,036
|
| Unpaid principal balance, with no allowance |
5,502
|
5,502
|
16,639
|
| Average recorded investment, with no allowance |
4,694
|
5,259
|
16,417
|
| Interest income recognized in period, with no allowance |
50
|
162
|
571
|
| Recorded investment, with an allowance |
18,527
|
18,527
|
16,411
|
| Unpaid principal balance, with an allowance |
25,946
|
25,946
|
16,992
|
| Related allowance |
6,297
|
6,297
|
4,276
|
| Average recorded investment, with an allowance |
19,041
|
19,035
|
17,912
|
| Interest income recognized in period, with an allowance |
136
|
478
|
651
|
| Recorded investment |
23,138
|
23,138
|
26,447
|
| Unpaid principal balance |
31,448
|
31,448
|
33,631
|
| Average recorded investment |
23,735
|
24,294
|
34,329
|
| Interest income recognized in period |
186
|
640
|
1,222
|
| Real Estate Portfolio Segment[Member] |
|
|
|
| Recorded investment, with no allowance |
7,340
|
7,340
|
5,648
|
| Unpaid principal balance, with no allowance |
7,522
|
7,522
|
5,814
|
| Average recorded investment, with no allowance |
7,561
|
7,895
|
5,891
|
| Interest income recognized in period, with no allowance |
74
|
279
|
296
|
| Recorded investment, with an allowance |
5,743
|
5,743
|
6,756
|
| Unpaid principal balance, with an allowance |
5,743
|
5,743
|
6,756
|
| Related allowance |
274
|
274
|
1,163
|
| Average recorded investment, with an allowance |
5,743
|
5,952
|
6,776
|
| Interest income recognized in period, with an allowance |
73
|
228
|
349
|
| Recorded investment |
13,083
|
13,083
|
12,404
|
| Unpaid principal balance |
13,265
|
13,265
|
12,570
|
| Average recorded investment |
13,304
|
13,847
|
12,667
|
| Interest income recognized in period |
147
|
507
|
645
|
| Real Estate Portfolio Segment[Member] | Construction Loans [Member] |
|
|
|
| Recorded investment, with no allowance |
466
|
466
|
574
|
| Unpaid principal balance, with no allowance |
469
|
469
|
577
|
| Average recorded investment, with no allowance |
481
|
543
|
663
|
| Interest income recognized in period, with no allowance |
7
|
21
|
31
|
| Recorded investment, with an allowance |
997
|
997
|
997
|
| Unpaid principal balance, with an allowance |
997
|
997
|
997
|
| Related allowance |
181
|
181
|
120
|
| Average recorded investment, with an allowance |
997
|
997
|
997
|
| Interest income recognized in period, with an allowance |
14
|
42
|
56
|
| Recorded investment |
1,463
|
1,463
|
1,571
|
| Unpaid principal balance |
1,466
|
1,466
|
1,574
|
| Average recorded investment |
1,478
|
1,540
|
1,660
|
| Interest income recognized in period |
21
|
63
|
87
|
| Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member] |
|
|
|
| Recorded investment, with no allowance |
1,800
|
1,800
|
2,640
|
| Unpaid principal balance, with no allowance |
1,982
|
1,982
|
2,806
|
| Average recorded investment, with no allowance |
2,008
|
2,311
|
2,875
|
| Interest income recognized in period, with no allowance |
16
|
91
|
159
|
| Recorded investment, with an allowance |
3,507
|
3,507
|
3,914
|
| Unpaid principal balance, with an allowance |
3,507
|
3,507
|
3,914
|
| Related allowance |
34
|
34
|
601
|
| Average recorded investment, with an allowance |
3,507
|
3,507
|
3,801
|
| Interest income recognized in period, with an allowance |
46
|
142
|
215
|
| Recorded investment |
5,307
|
5,307
|
6,554
|
| Unpaid principal balance |
5,489
|
5,489
|
6,720
|
| Average recorded investment |
5,515
|
5,818
|
6,676
|
| Interest income recognized in period |
62
|
233
|
374
|
| Real Estate Portfolio Segment[Member] | One to Four Family [Member] |
|
|
|
| Recorded investment, with no allowance |
501
|
501
|
2,262
|
| Unpaid principal balance, with no allowance |
501
|
501
|
2,262
|
| Average recorded investment, with no allowance |
501
|
501
|
2,289
|
| Interest income recognized in period, with no allowance |
|
1
|
93
|
| Interest income recognized in period, with no allowance |
(4)
|
|
|
| Recorded investment, with an allowance |
850
|
850
|
980
|
| Unpaid principal balance, with an allowance |
850
|
850
|
980
|
| Related allowance |
160
|
160
|
281
|
| Average recorded investment, with an allowance |
850
|
850
|
1,113
|
| Interest income recognized in period, with an allowance |
12
|
35
|
54
|
| Recorded investment |
1,351
|
1,351
|
3,242
|
| Unpaid principal balance |
1,351
|
1,351
|
3,242
|
| Average recorded investment |
1,351
|
1,351
|
3,402
|
| Interest income recognized in period |
8
|
36
|
147
|
| Real Estate Portfolio Segment[Member] | Other Mortgages [Member] |
|
|
|
| Recorded investment, with no allowance |
5,039
|
5,039
|
746
|
| Unpaid principal balance, with no allowance |
5,039
|
5,039
|
746
|
| Average recorded investment, with no allowance |
5,052
|
5,083
|
727
|
| Interest income recognized in period, with no allowance |
62
|
187
|
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 |
1,386
|
1,595
|
1,862
|
| Interest income recognized in period, with an allowance |
15
|
51
|
80
|
| Recorded investment |
6,425
|
6,425
|
2,608
|
| Unpaid principal balance |
6,425
|
6,425
|
2,608
|
| Average recorded investment |
6,438
|
6,678
|
2,589
|
| Interest income recognized in period |
77
|
238
|
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
|
2
|
3
|
| Recorded investment |
49
|
49
|
88
|
| Unpaid principal balance |
49
|
49
|
89
|
| Average recorded investment |
49
|
49
|
84
|
| Interest income recognized in period |
$ 1
|
$ 2
|
$ 6
|