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Note 13 - Income Taxes (Details Textual) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2018
Oct. 01, 2017
Effective Income Tax Rate Reconciliation, Percent, Total 24.00% 32.00%
Unrecognized Tax Benefits, Period Increase (Decrease), Total $ (1.0)  
Unrecognized Tax Benefits, Ending Balance 28.2  
Increase (Decrease) in Deferred Tax Assets $ (3.3)