Note 5 - Allowance for Credit Losses (Details) - Historical Loss on Unfunded Commitments - USD ($)	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Note 5 - Allowance for Credit Losses (Details) - Historical Loss on Unfunded Commitments [Line Items]
Allowance for loan and lease losses	$ 7,809,700	$ 7,873,790
Provisions for credit losses	846,457	1,125,407
Loans charged off	(702,557)	(1,316,082)
Recoveries	249,110	126,585
Allowance for loan and lease losses	8,202,710	7,809,700
Allowance for Loan and Lease Losses [Member]
Note 5 - Allowance for Credit Losses (Details) - Historical Loss on Unfunded Commitments [Line Items]
Allowance for loan and lease losses	7,519,970	7,609,467
Provisions for credit losses	800,000	1,100,000
Loans charged off	(702,557)	(1,316,082)
Recoveries	249,110	126,585
Allowance for loan and lease losses	7,866,523	7,519,970
Allowance for Unfunded Commitments [Member]
Note 5 - Allowance for Credit Losses (Details) - Historical Loss on Unfunded Commitments [Line Items]
Allowance for loan and lease losses	289,730	264,323
Provisions for credit losses	46,457	25,407
Allowance for loan and lease losses	$ 336,187	$ 289,730

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

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Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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Amount of direct write-downs of financing receivables charged against the allowance.

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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ 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 (c)(2)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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