Note 3 - Investment Securities: Schedule of amortized cost and estimated fair values of debt securities (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Available-for-sale Securities, Amortized Cost Basis	$ 194,854,278	$ 168,843,453
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	198,630,035	167,190,644
Held to Maturity, at amortized cost	5,555,295	12,003,446
US States and Political Subdivisions Debt Securities
Available-for-sale Securities, Amortized Cost Basis	184,661,787	168,713,137
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	187,909,036	166,799,531
Held to Maturity, at amortized cost	5,555,295	12,003,446
Held-to-maturity Securities, Fair Value	5,574,729	11,933,827
Corporate Debt Securities
Available-for-sale Securities, Amortized Cost Basis	130,316	130,316
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 445,325	$ 391,113

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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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Amount of available-for-sale debt securities at fair value that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the fair value over several maturity groupings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

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Amount before other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

+ References

No definition available.

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Fair value of investments in debt securities classified as held-to-maturity.

+ References

Reference 1: 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=82897076&loc=d3e27232-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Paragraph 5
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