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Note 3 - Company Loan Portfolio (Details) - USD ($)	6 Months Ended
	Jun. 30, 2016	Sep. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Commercial Portfolio Segment [Member]
Loans and Leases Receivable, Gross	$ 71,658,000			$ 59,752,000
Loans increase (decrease)	$ 11,906,000
Loans increase (decrease)	19.90%
Allowance for loan losses	$ (3,400,000)		$ (1,083,000)	(1,027,000)	$ (982,000)	$ (1,297,000)	$ (1,918,000)
Commercial Real Estate Portfolio Segment [Member]
Loans and Leases Receivable, Gross	270,003,000			245,828,000
Loans increase (decrease)	$ 24,175,000
Loans increase (decrease)	9.80%
Allowance for loan losses	$ (2,295,000)		(1,943,000)	(1,970,000)	(2,145,000)	(2,024,000)	(1,419,000)
Construction Portfolio Segment [Member]
Loans and Leases Receivable, Gross	26,094,000			15,551,000
Loans increase (decrease)	$ 10,543,000
Loans increase (decrease)	67.80%
Allowance for loan losses	$ (169,000)		(650,000)	(486,000)	(275,000)	(222,000)	(63,000)
Construction to Permanent Portfolio Segment [Member]
Loans and Leases Receivable, Gross	4,229,000			4,880,000
Loans increase (decrease)	$ (651,000)
Loans increase (decrease)	(13.30%)
Allowance for loan losses	$ (145,000)		(121,000)	(123,000)	(150,000)	(191,000)	(215,000)
Residential Portfolio Segment [Member]
Loans and Leases Receivable, Gross	104,746,000			110,837,000
Loans increase (decrease)	$ (6,091,000)
Loans increase (decrease)	(5.50%)
Allowance for loan losses	$ (647,000)		(624,000)	(740,000)	(832,000)	(730,000)	(831,000)
Consumer Portfolio Segment [Member]
Loans and Leases Receivable, Gross	51,924,000			47,521,000
Loans increase (decrease)	$ 4,403,000
Loans increase (decrease)	9.30%
Allowance for loan losses	$ (531,000)		(609,000)	(677,000)	(726,000)	(711,000)	(478,000)
Loans and Leases Receivable, Gross	528,654,000			484,369,000
Loans increase (decrease)	$ 44,285,000
Loans increase (decrease)	9.10%
Allowance for loan losses	$ (7,209,000)		$ (5,247,000)	(5,242,000)	$ (5,208,000)	$ (5,193,000)	$ (4,924,000)
Allowance for loan losses increase (decrease)	$ (1,967,000)
Allowance for loan losses increase (decrease)	37.50%
Loans receivable, net	$ 521,445,000	$ 521,445,000		$ 479,127,000
Loans receivable, net increase (decrease)	$ 42,318,000
Loans receivable, net increase (decrease)	8.80%

X

- Definition

Percentage of increase (decrease) in allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

No definition available.

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Amount of increase (decrease) before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

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Amount of increase (decrease) of allowance reserve for credit loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(d))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=65884687&loc=d3e4428-111522

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+ References

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-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
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