Note 12 - Pension and Other Postretirement Benefit Plans (Details) - The Following Benefit Payments, Which Reflect Expected Future Service, Are Expected to be Paid by the Retirement Plan (Postretirement Plans [Member], USD $)	Dec. 31, 2014
Postretirement Plans [Member]
Note 12 - Pension and Other Postretirement Benefit Plans (Details) - The Following Benefit Payments, Which Reflect Expected Future Service, Are Expected to be Paid by the Retirement Plan [Line Items]
2015	$ 181,000
2016	208,000
2017	232,000
2018	254,000
2019	272,000
2020 - 2024	$ 1,509,000

Note 12 - Pension and Other Postretirement Benefit Plans (Details) - The Following Benefit Payments, Which Reflect Expected Future Service, Are Expected to be Paid by the Retirement Plan (Postretirement Plans [Member], USD $)

Dec. 31, 2014

Postretirement Plans [Member]

Note 12 - Pension and Other Postretirement Benefit Plans (Details) - The Following Benefit Payments, Which Reflect Expected Future Service, Are Expected to be Paid by the Retirement Plan [Line Items]