Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Number of Days of Delinquent Loans Nonaccrual of Interest	90 days
Minimum Number of Days of Discontinued Loan Payments for Modified Loan to be Placed on Nonaccrual	90 days
Number of Days Past Due	30 days
Threshold for Designation to Impaired Status	$ 250,000
Minimum Number of Days Consumer Loans are Past Due for Losses to be Charged Off	120 days
Maximum Number of Days Consumer Loans are Past Due for Losses to be Charged Off	180 days
Number of Days Loans Secured by Residential Or Commercial Real Estate Are Past Due for Losses to Be Carged Off	180 days
Period of Time Between Issuance of Loan Commitment and Closing and Sale of Loans Lower Range	30 days
Period of Time Between Issuance of Loan Commitments and Closing and Sale of Loans Upper Range	60 days
Noncontrolling Interest, Ownership Percentage by Parent	100.00%
Goodwill, Impairment Loss	$ 0	$ 0	$ 0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0	0
Advertising Expense	$ 122,000	$ 105,000	$ 174,000
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life	10 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life	12 years
Building [Member]
Property, Plant and Equipment, Useful Life	40 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life	10 years
Computer Equipment [Member]
Property, Plant and Equipment, Useful Life	3 years