Note 13 - Benefit Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 13 - Benefit Plans (Details) [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	4.00%
Defined Contribution Plan, Cost Recognized	$ 480,000	$ 425,000	$ 366,000
Annuity Payment, Maximum Contractual Term	10 years
Retirement Age to Be Attained to Receive Postretirement Benefits	65
Defined Benefit Pension Plan, Liabilities	1,400,000	1,400,000
Pension and Other Postretirement Benefit Expense	36,000	39,000	27,000
Cash Surrender Value of Life Insurance	2,200,000	2,200,000
Deferred Compensation Plan, Benefits, Number of Years to Vest	3 years
Deferred Compensation Plan, Amount Vested	833,000	638,000
Deferred Compensation Arrangement with Individual, Compensation Expense	147,000	0	109,000
Deferred Compensation Plan, Shares Acquired (in Shares)	0	0	0
Deferred Compensation Plan, Shares Held (in Shares)	25,437
Minimum [Member]
Note 13 - Benefit Plans (Details) [Line Items]
Monthly Annuity Payments	15,000
Maximum [Member]
Note 13 - Benefit Plans (Details) [Line Items]
Monthly Annuity Payments	$ 25,000