Note 2 - Community National Bancorporation and Community National Bank (Details) - Disposal Group (USD $)	12 Months Ended		0 Months Ended
	Dec. 31, 2013		Oct. 04, 2013	Oct. 11, 2013	Dec. 31, 2014		Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash	$ 30,425,618	[1]				[1]		[1]
Loans receivable	54,458,870
Premises and equipment	2,373,822
Core deposit intangible	1,390,762
Other assets	138,899
Total assets sold	88,787,971
Deposits	91,022,098
Other liabilities	100,089
Total liabilities sold	91,122,187
Gain on sale, pre-tax	2,334,216
CNB Branches [Member] | Mason City, Iowa [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash			29,905,991
Loans receivable			22,709,735
Premises and equipment			776,782
Core deposit intangible			910,415
Other assets			68,456
Total assets sold			54,371,379
Deposits			55,191,930
Other liabilities			53,421
Total liabilities sold			55,245,351
Gain on sale, pre-tax			873,972
CNB Branches [Member] | Austin, Minnesota [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash				519,627
Loans receivable				31,749,135
Premises and equipment				1,597,040
Core deposit intangible				480,347
Other assets				70,443
Total assets sold				34,416,592
Deposits				35,830,168
Other liabilities				46,668
Total liabilities sold				35,876,836
Gain on sale, pre-tax				$ 1,460,244

[1] Net cash paid at closing totaled $30,425,618