Note 5 - Loans - Impaired Loans (Details) - Commercial Real Estate Portfolio Segment [Member] - USD ($)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Unpaid Contractual Principal Balance	$ 3,867,381	$ 5,458,182
Recorded Investment With No Allowance	3,177,381	2,937,439
Recorded Investment With Allowance		2,245,743
Total Recorded Investment	3,177,381	5,183,182
Related Allowance		127,213
Average Recorded Investment	4,180,282	2,591,591
Interest Recognized	$ 120,193	$ 268,652

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524

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- Definition

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Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524

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