Note 10 - Earnings Per Share (Details Textual) - shares	3 Months Ended
	Apr. 02, 2017	Mar. 27, 2016
Dilutive Securities Included in Computation of Earnings Per Share Amount	1,180,031	1,242,230
Dilutive Securities Included in Computation of Earnings Per Share Amount Restricted Stock	15,900	32,800
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	244,591	342,809
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,015,050	1,051,750