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Note 4 - Loans (Details) - Troubled Debt Restructurings That Subsequently Defaulted	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2013 USD ($)
Note 4 - Loans (Details) - Troubled Debt Restructurings That Subsequently Defaulted [Line Items]
Number of Contracts	0	1
Recorded Investment	$ 0	$ 81,277
Commercial and Agricultural Portfolio Segment [Member] | Commercial [Member]
Note 4 - Loans (Details) - Troubled Debt Restructurings That Subsequently Defaulted [Line Items]
Number of Contracts	0	1
Recorded Investment	$ 0	$ 81,277

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- Definition

Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953682-111524

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Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953682-111524

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