Note 10 - Pension and Other Postretirement Benefits (Details) - Weighted Average Assumptions Used in Computing the Benefit Obligations for the Plans	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
U.S. Plan [Member]
Note 10 - Pension and Other Postretirement Benefits (Details) - Weighted Average Assumptions Used in Computing the Benefit Obligations for the Plans [Line Items]
Discount rate	3.85%	4.50%
Expected return on plan assets	7.50%	7.50%
Canadian Plan [Member]
Note 10 - Pension and Other Postretirement Benefits (Details) - Weighted Average Assumptions Used in Computing the Benefit Obligations for the Plans [Line Items]
Discount rate	3.60%	4.13%
Expected return on plan assets	5.50%	6.00%
Rate of compensation increase	2.00%	2.00%