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Note 7 - Deposits - Contractual Maturities of Certificates of Deposit (Details) $ in Thousands	Dec. 31, 2017 USD ($)
1 year or less	$ 212,778
1 year or less, Weighted Ave. Stated Interest Rate	1.2056%
More than 1 year through 2 years	$ 25,064
More than 1 year through 2 years, Weighted Ave. Stated Interest Rate	1.6257%
More than 2 years through 3 years	$ 1,315
More than 2 years through 3 years, Weighted Ave. Stated Interest Rate	0.7947%
More than 3 years through 4 years	$ 308
More than 3 years through 4 years, Weighted Ave. Stated Interest Rate	0.5419%
More than 4 years through 5 years	$ 622
More than 4 years through 5 years, Weighted Ave. Stated Interest Rate	0.577%
Contractual Maturities of Certificates of Deposit, Total	$ 240,087
Contractual Maturities of Certificates of Deposit, Total, Weighted Ave. Stated Interest Rate	1.2447%
Certificates of Deposits Less Than $250,000 [Member]
1 year or less	$ 152,420
1 year or less, Weighted Ave. Stated Interest Rate	1.0906%
More than 1 year through 2 years	$ 18,556
More than 1 year through 2 years, Weighted Ave. Stated Interest Rate	1.5755%
More than 2 years through 3 years	$ 1,315
More than 2 years through 3 years, Weighted Ave. Stated Interest Rate	0.7947%
More than 3 years through 4 years	$ 308
More than 3 years through 4 years, Weighted Ave. Stated Interest Rate	0.5419%
More than 4 years through 5 years	$ 622
More than 4 years through 5 years, Weighted Ave. Stated Interest Rate	0.577%
Contractual Maturities of Certificates of Deposit, Total	$ 173,221
Contractual Maturities of Certificates of Deposit, Total, Weighted Ave. Stated Interest Rate	1.1375%
Certificates of Deposit $250,000 or Greater [Member]
1 year or less	$ 60,358
1 year or less, Weighted Ave. Stated Interest Rate	1.4959%
More than 1 year through 2 years	$ 6,508
More than 1 year through 2 years, Weighted Ave. Stated Interest Rate	1.7689%
More than 2 years through 3 years
More than 2 years through 3 years, Weighted Ave. Stated Interest Rate	0.00%
More than 3 years through 4 years
More than 3 years through 4 years, Weighted Ave. Stated Interest Rate	0.00%
More than 4 years through 5 years
More than 4 years through 5 years, Weighted Ave. Stated Interest Rate	0.00%
Contractual Maturities of Certificates of Deposit, Total	$ 66,866
Contractual Maturities of Certificates of Deposit, Total, Weighted Ave. Stated Interest Rate	1.5225%

X

- Definition

Weighted average interest rate for time deposits held by the entity.

+ References

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- Definition

Amount of time deposits maturing in the fifth fiscal year following the latest fiscal year. Time deposits include, but are not limited to, certificates of deposits. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

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Amount of time deposits maturing in the fourth fiscal year following the latest fiscal year. Time deposits include, but are not limited to, certificates of deposits. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

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Amount of time deposits maturing in the next fiscal year following the latest fiscal year. Time deposits include, but are not limited to, certificates of deposits. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Industry Guide
-Number 3
-Section V
-Paragraph D-E

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Amount of time deposits maturing in the third fiscal year following the latest fiscal year. Time deposits include, but are not limited to, certificates of deposits. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

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- Definition

Amount of time deposits maturing in the second fiscal year following the latest fiscal year. Time deposits include, but are not limited to, certificates of deposits. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

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- Definition

Amount of time deposit liabilities, including certificates of deposit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 405
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=50488274&loc=d3e64164-112818

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.12)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Industry Guide
-Number 3
-Section V
-Paragraph D-E

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Weighted average interest rate for time deposits held by the entity with maturities greater than four years, but five years or less.

+ References

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Weighted average interest rate for time deposits held by the entity with maturities greater than three years, but four years or less.

+ References

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Weighted average interest rate for time deposits held by the entity with maturities of one year or less.

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No definition available.

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Weighted average interest rate for time deposits held by the entity with maturities greater than two years, but three years or less.

+ References

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Weighted average interest rate for time deposits held by the entity with maturities greater than one year, but two years or less.

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