Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Derivative Financial Instruments - Average USD Fair Value Measurements for Contracts Rates (Details)

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Note 10 - Derivative Financial Instruments - Average USD Fair Value Measurements for Contracts Rates (Details)
Jul. 01, 2018
Dec. 31, 2017
Average USD:CAD contract rate 18.52% 18.69%
Average USD:CAD mark-to-market rate 20.00% 20.11%
Canada, Dollars    
Average USD:CAD contract rate 1.24% 1.29%
Average USD:CAD mark-to-market rate 1.31% 1.26%