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Note 3 - Earnings Per Share - Distributed and Undistributed Earnings (Details) - $ / shares	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Basic Earnings Per Share
Distributed Earnings (in dollars per share)	$ 0.07	$ 0.06	$ 0.19	$ 0.10
Undistributed Earnings (in dollars per share)	0.25	0.19	0.59	0.66
Total (in dollars per share)	0.32	0.25	0.78	0.76
Diluted Earnings Per Share
Distributed Earnings (in dollars per share)	0.07	0.06	0.19	0.10
Undistributed Earnings (in dollars per share)	0.25	0.19	0.59	0.66
Total (in dollars per share)	0.32	0.25	0.78	0.76
Basic Earnings Per Share (in dollars per share)	0.32	0.25	0.78	0.76
Diluted Earnings Per Share (in dollars per share)	$ 0.32	$ 0.25	$ 0.78	$ 0.76

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Dividends declared in the period and the contractual amount of dividends (or interest on participating income bonds) that must be paid per security.

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The earnings attributable to each security on the basis that all of the earnings for the period had been distributed (to the extent that each security may share in earnings). This is the earnings amount which reflects the participation rights in undistributed earnings of each security.

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