Note 10 - Pension and Other Postretirement Benefits (Details) - Computing Net Pension Expense for the Plans	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
U.S. Plan [Member]
Note 10 - Pension and Other Postretirement Benefits (Details) - Computing Net Pension Expense for the Plans [Line Items]
Discount rate	4.78%	3.85%
Canadian Plan [Member]
Note 10 - Pension and Other Postretirement Benefits (Details) - Computing Net Pension Expense for the Plans [Line Items]
Discount rate	4.39%	3.60%
Rate of compensation increase	2.00%	2.00%