XML 80 R69.htm IDEA: XBRL DOCUMENT v3.5.0.2
Note 10 - Pension and Other Postretirement Benefit Plans (Details Textual) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Directors Plan [Member]    
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year   $ 300,000
Defined Benefit Plan, Contributions by Employer $ 108,000  
Other Postretirement Benefit Plan [Member]    
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year   $ 200,000
Defined Benefit Plan, Contributions by Employer $ 48,000