Note 12 - Pension and Other Postretirement Benefit Plans (Details) - Assumptions Used to Determine the Retirement Plan’s Benefit Obligations (Retirement Plan [Member])	Dec. 31, 2014	Dec. 31, 2013
Retirement Plan [Member]
Note 12 - Pension and Other Postretirement Benefit Plans (Details) - Assumptions Used to Determine the Retirement Plan’s Benefit Obligations [Line Items]
Weighted average discount rate	3.76%	4.60%
Rate of increase in future compensation levels
Expected long-term rate of return on assets	7.50%	7.50%