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Note 3 - Available-for-sale Securities - Investment Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Available-for-sale securities, amortized cost	$ 24,624	$ 29,625
Available-for-sale securities, gross unrealized gains	35	71
Available-for-sale securities, gross unrealized losses	231	319
Available-for-sale securities	24,428	29,377
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Available-for-sale securities, amortized cost	10,624	13,625
Available-for-sale securities, gross unrealized gains	9
Available-for-sale securities, gross unrealized losses	192	212
Available-for-sale securities	10,441	13,413
Corporate Debt Securities [Member]
Available-for-sale securities, amortized cost	9,000	9,000
Available-for-sale securities, gross unrealized gains		71
Available-for-sale securities, gross unrealized losses	39	61
Available-for-sale securities	8,961	9,010
Subordinated Notes [Member]
Available-for-sale securities, amortized cost	5,000	2,000
Available-for-sale securities, gross unrealized gains	26
Available-for-sale securities, gross unrealized losses
Available-for-sale securities	$ 5,026	2,000
US Government Agencies Debt Securities [Member]
Available-for-sale securities, amortized cost		5,000
Available-for-sale securities, gross unrealized gains
Available-for-sale securities, gross unrealized losses		46
Available-for-sale securities		$ 4,954

X

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562

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X

- Definition

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563

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- Definition

Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563

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X

- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.2)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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