Note 6 - Loans Receivable and Allowance for Credit Losses - Loans by Internal Risk Rating (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Pass	$ 179,808
Pass	699,045
Pass	487,660
Pass	307,841
Pass	203,230
Pass	477,856
Pass	206,628
Pass	2,562,068	$ 2,514,123
Loans receivable	2,562,068	2,514,123
Pass [Member]
Pass	179,808
Pass	699,045
Pass	487,660
Pass	303,706
Pass	200,952
Pass	466,654
Pass	205,717
Pass	2,543,542	2,495,467
Loans receivable	2,543,542	2,495,467
Special Mention [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	234
Pass	0
Pass	234	236
Loans receivable	234	236
Substandard [Member]
Pass	0
Pass	0
Pass	0
Pass	4,135
Pass	2,278
Pass	10,968
Pass	911
Pass	18,292	18,420
Loans receivable	18,292	18,420
Doubtful [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0	0
Loans receivable	0	0
Commercial Real Estate Portfolio Segment [Member]
Pass	31,018
Pass	196,776
Pass	114,902
Pass	113,200
Pass	80,853
Pass	221,565
Pass	13,235
Pass	771,549	780,311
Loans receivable	771,549	780,311
Commercial Real Estate Portfolio Segment [Member] \| Pass [Member]
Pass	31,018
Pass	196,776
Pass	114,902
Pass	113,200
Pass	80,853
Pass	217,072
Pass	13,235
Pass	767,056	775,818
Loans receivable	767,056	775,818
Commercial Real Estate Portfolio Segment [Member] \| Special Mention [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0	0
Loans receivable	0	0
Commercial Real Estate Portfolio Segment [Member] \| Substandard [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	4,493
Pass	0
Pass	4,493	4,493
Loans receivable	4,493	4,493
Commercial Real Estate Portfolio Segment [Member] \| Doubtful [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0	0
Loans receivable	0	0
Construction and Land Development Portfolio Segment [Member]
Pass	5,614
Pass	90,869
Pass	88,507
Pass	30,107
Pass	5,759
Pass	10,612
Pass	2,749
Pass	234,217	216,008
Loans receivable	234,217	216,008
Construction and Land Development Portfolio Segment [Member] \| Pass [Member]
Pass	5,614
Pass	90,869
Pass	88,507
Pass	30,107
Pass	5,759
Pass	10,612
Pass	2,749
Pass	234,217	216,008
Loans receivable	234,217	216,008
Construction and Land Development Portfolio Segment [Member] \| Special Mention [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0	0
Loans receivable	0	0
Construction and Land Development Portfolio Segment [Member] \| Substandard [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0	0
Loans receivable	0	0
Construction and Land Development Portfolio Segment [Member] \| Doubtful [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0	0
Loans receivable	0	0
Commercial Portfolio Segment [Member]
Pass	60,485
Pass	42,017
Pass	18,914
Pass	13,478
Pass	16,850
Pass	24,200
Pass	113,603
Pass	289,547	252,376
Loans receivable	289,547	252,376
Commercial Portfolio Segment [Member] \| Pass [Member]
Pass	60,485
Pass	42,017
Pass	18,914
Pass	13,478
Pass	14,689
Pass	23,893
Pass	113,603
Pass	287,079	249,818
Loans receivable	287,079	249,818
Commercial Portfolio Segment [Member] \| Special Mention [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0	0
Loans receivable	0	0
Commercial Portfolio Segment [Member] \| Substandard [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	2,161
Pass	307
Pass	0
Pass	2,468	2,558
Loans receivable	2,468	2,558
Commercial Portfolio Segment [Member] \| Doubtful [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0	0
Loans receivable	0	0
Owner Occupied Real Estate [Member]
Pass	18,542
Pass	96,030
Pass	86,695
Pass	57,659
Pass	80,910
Pass	183,873
Pass	11,001
Pass	534,710	526,570
Loans receivable	534,710	526,570
Owner Occupied Real Estate [Member] \| Pass [Member]
Pass	18,542
Pass	96,030
Pass	86,695
Pass	53,524
Pass	80,910
Pass	178,196
Pass	11,001
Pass	524,898	516,741
Loans receivable	524,898	516,741
Owner Occupied Real Estate [Member] \| Special Mention [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	234
Pass	0
Pass	234	236
Loans receivable	234	236
Owner Occupied Real Estate [Member] \| Substandard [Member]
Pass	0
Pass	0
Pass	0
Pass	4,135
Pass	0
Pass	5,443
Pass	0
Pass	9,578	9,593
Loans receivable	9,578	9,593
Owner Occupied Real Estate [Member] \| Doubtful [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0	0
Loans receivable	0	0
Consumer Portfolio Segment [Member]
Pass	505
Pass	2,018
Pass	1,773
Pass	2,138
Pass	1,580
Pass	4,320
Pass	66,040
Pass	78,374	83,487
Loans receivable	78,374	83,487
Consumer Portfolio Segment [Member] \| Pass [Member]
Pass	505
Pass	2,018
Pass	1,773
Pass	2,138
Pass	1,463
Pass	4,296
Pass	65,129
Pass	77,322	82,412
Loans receivable	77,322	82,412
Consumer Portfolio Segment [Member] \| Special Mention [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0	0
Loans receivable	0	0
Consumer Portfolio Segment [Member] \| Substandard [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	117
Pass	24
Pass	911
Pass	1,052	1,075
Loans receivable	1,052	1,075
Consumer Portfolio Segment [Member] \| Doubtful [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0	0
Loans receivable	0	0
Residential Portfolio Segment [Member]
Pass	63,644
Pass	212,617
Pass	172,253
Pass	91,259
Pass	17,278
Pass	33,286
Pass	0
Pass	590,337	536,332
Loans receivable	590,337	536,332
Residential Portfolio Segment [Member] \| Pass [Member]
Pass	63,644
Pass	212,617
Pass	172,253
Pass	91,259
Pass	17,278
Pass	32,585
Pass	0
Pass	589,636	535,631
Loans receivable	589,636	535,631
Residential Portfolio Segment [Member] \| Special Mention [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0	0
Loans receivable	0	0
Residential Portfolio Segment [Member] \| Substandard [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	701
Pass	0
Pass	701	701
Loans receivable	701	701
Residential Portfolio Segment [Member] \| Doubtful [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0	0
Loans receivable	0	0
Paycheck Protection Program CARES Act [Member]
Pass	0
Pass	58,718
Pass	4,616
Pass	0
Pass	0
Pass	0
Pass	0
Pass	63,334	119,039
Loans receivable	63,334	119,039
Paycheck Protection Program CARES Act [Member] \| Pass [Member]
Pass	0
Pass	58,718
Pass	4,616
Pass	0
Pass	0
Pass	0
Pass	0
Pass	63,334	119,039
Loans receivable	63,334	119,039
Paycheck Protection Program CARES Act [Member] \| Special Mention [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0	0
Loans receivable	0	0
Paycheck Protection Program CARES Act [Member] \| Substandard [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0	0
Loans receivable	0	0
Paycheck Protection Program CARES Act [Member] \| Doubtful [Member]
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0
Pass	0	0
Loans receivable	$ 0	$ 0

Amortized cost, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

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- Definition

Amortized cost of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 79
-URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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- Definition

Amortized cost of financing receivable originated four years prior to current fiscal year. Excludes net investment in lease.

+ References

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- Definition

Amortized cost of financing receivable originated in current fiscal year. Excludes net investment in lease.

+ References

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- Definition

Amortized cost of financing receivable originated in fiscal year prior to current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447

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- Definition

Amortized cost of financing receivable originated three years prior to current fiscal year. Excludes net investment in lease.

+ References

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- Definition

Amortized cost of financing receivable originated two years prior to current fiscal year. Excludes net investment in lease.

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- Definition

Amortized cost of financing receivable that can be withdrawn, repaid, and redrawn.

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