Note 1 - Summary of Significant Accounting Policies (Details)		9 Months Ended	12 Months Ended
	Oct. 31, 2014 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Goodwill, Impairment Loss			$ 0
Deferred Tax Assets, Valuation Allowance		$ 0	$ 0	$ 0
Banking Services [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Number of Offices		22
Lending Services [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Number of Offices		4
Virginia Heritage Bank [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans	$ 800,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposit Liabilities	645,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Borrowings	95,000,000
Goodwill	102,300,000
Business Combination, Fair Value Credit Mark on Loan Portfolio	12,500,000
Eagle Commercial Ventures, LLC [Member] | Risk Level, High [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Number of Higher Risk Lending Transactions Outstanding		7	4
Loans Receivable, Net		$ 11,500,000	$ 6,200,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Virginia Heritage Bank [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans	3,000,000
Minimum [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Loan Period		30 days
Minimum [Member] | Furniture and Fixtures [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life		5 years
Minimum [Member] | Building and Building Improvements [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life		10 years
Maximum [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Loan Period		90 days
Maximum [Member] | Furniture and Fixtures [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life		7 years
Maximum [Member] | Building and Building Improvements [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life		40 years
Core Deposits [Member] | Virginia Heritage Bank [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 4,600,000
Finite-Lived Intangible Asset, Useful Life	6 years
Servicing Contracts [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Other Intangible Assets, Net		$ 0	$ 0	$ 0
Computer Software, Intangible Asset [Member] | Minimum [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life		3 years
Computer Software, Intangible Asset [Member] | Maximum [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life		5 years