Note 2 - Securities (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Note 2 - Securities (Details) [Line Items]
Number Of Mutual Funds With Unrealized Losses	1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	$ 88,370,000	$ 88,446,000
Available For Sale Securities Continuous Unrealized Loss Position Aggregate Losses Accumulated In Investments	7,700,000
Available-for-sale Securities	141,097,000	131,178,000
Securities Of Specific Issuer Other Than Government And Its Agencies Maximum Percentage On Stockholders Equity	10.00%
Debt Securities [Member]
Note 2 - Securities (Details) [Line Items]
Number Of Debt Securities With Unrealized Losses	63
State Of Michigan and all its Political Subdivisions [Member]
Note 2 - Securities (Details) [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	17,400,000	17,400,000
Available-for-sale Securities	17,800,000	17,800,000
US Government Agency Debt Obligations And Mortgage-Backed Securities [Member]
Note 2 - Securities (Details) [Line Items]
Available-for-sale Securities, Restricted	$ 105,200,000	$ 94,400,000