Note 17 - Regulatory Matters (Details) (USD $)	3 Months Ended		12 Months Ended
	Dec. 31, 2009	Sep. 30, 2009	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2012 United Bank [Member] Compliance [Member]	Dec. 31, 2013 United Bank [Member]		Dec. 31, 2012 United Bank [Member]		Dec. 31, 2013 Citizens Northern [Member] Compliance [Member]	Dec. 31, 2013 Citizens Northern [Member]		Dec. 31, 2012 Citizens Northern [Member]		Dec. 31, 2013 Safest Assets [Member]	Dec. 31, 2013 Riskier Assets [Member]
Note 17 - Regulatory Matters (Details) [Line Items]
Risk Weighting of Assets																0.00%	100.00%
Common Stock, Dividends, Per Share, Declared (in Dollars per share)	$ 0.10	$ 0.25	$ 0	$ 0	$ 0
Tier One Leverage Capital to Average Assets						9.00%	9.67%	[1],[2]	9.45%	[1],[2]	9.00%	9.67%	[1],[2]	9.36%	[1],[2]
Capital to Risk Weighted Assets						13.00%	16.33%	[1],[3]	16.69%	[1],[3]		14.82%	[1],[3]	14.22%	[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%).