Note 10 - Regulatory Matters (Details)	0 Months Ended
	May 15, 2014 Preferred Stock [Member]	Jun. 30, 2014 Compliance [Member] United Bank [Member]	Jun. 30, 2014 Compliance [Member] Citizens Northern [Member]	Jun. 30, 2014 Safest Assets [Member]	Jun. 30, 2014 Riskier Assets [Member]	Jun. 30, 2014 United Bank [Member]		Dec. 31, 2013 United Bank [Member]		Jun. 30, 2014 Citizens Northern [Member]		Dec. 31, 2013 Citizens Northern [Member]
Note 10 - Regulatory Matters (Details) [Line Items]
Risk Weighting of Assets				0.00%	100.00%
Stock Redeemed or Called During Period, Shares (in Shares)	10,000
Tier One Leverage Capital to Average Assets		9.00%	9.00%			10.31%	[1]	9.67%	[1]	9.81%	[1]	9.67%	[1]
Capital to Risk Weighted Assets		13.00%				17.43%	[2]	16.33%	[2]	15.37%	[2]	14.82%	[2]

[1] Tier 1 Leverage ratio is computed by dividing a bank's Tier 1 Capital, as defined by regulation, by its total quarterly average assets.

[2] Tier 1 Risk-based and Total Risk-based Capital ratios are computed by dividing a bank's Tier 1 or Total Capital, as defined by regulation, by a risk-weighted sum of the bank's assets, with the risk weighting determined by general standards established by regulation. The safest assets (e.g., government obligations) are assigned a weighting of 0% with riskier assets receiving higher ratings (e.g., ordinary commercial loans are assigned a weighting of 100%).