Note 18 - Regulatory Matters (Details)	Dec. 31, 2014		Dec. 31, 2013
Compliance [Member] | United Bank [Member]
Note 18 - Regulatory Matters (Details) [Line Items]
Tier One Leverage Capital to Average Assets	9.00%
Capital to Risk Weighted Assets	13.00%
Compliance [Member] | Citizens Northern [Member]
Note 18 - Regulatory Matters (Details) [Line Items]
Tier One Leverage Capital to Average Assets	9.00%
Safest Assets [Member]
Note 18 - Regulatory Matters (Details) [Line Items]
Risk Weighting of Assets	0.00%
Riskier Assets [Member]
Note 18 - Regulatory Matters (Details) [Line Items]
Risk Weighting of Assets	100.00%
United Bank [Member]
Note 18 - Regulatory Matters (Details) [Line Items]
Tier One Leverage Capital to Average Assets	11.08%	[1],[2]	9.67%	[1],[2]
Capital to Risk Weighted Assets	19.26%	[1],[3]	16.33%	[1],[3]
Citizens Northern [Member]
Note 18 - Regulatory Matters (Details) [Line Items]
Tier One Leverage Capital to Average Assets	10.11%	[1],[2]	9.67%	[1],[2]
Capital to Risk Weighted Assets	15.71%	[1],[3]	14.82%	[1],[3]

[1] See discussion below under the caption "Summary of Regulatory Agreements" for minimum capital ratios required as part of the bank's regulatory agreement.

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

[3] 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%).