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Note 10 - Per Share Data (Tables)

9 Months Ended

Sep. 30, 2017

Notes Tables

Schedule of Weighted Average Number of Shares [Table Text Block]

		Thirteen Week Periods Ended								Thirty-Nine Week Periods Ended
		September 30, 2017				October 1, 2016				September 30, 2017				October 1, 2016

Basic weighted average shares outstanding			12,009,181				12,295,493				11,972,600				12,380,617
Dilutive effect of outstanding stock options and restricted stock awards			141,914				136,150				116,610				102,817
Weighted average dilutive shares outstanding			12,151,095				12,431,643				12,089,210				12,483,434

Unissued Shares of Common Stock [Table Text Block]

		September 30 , 2017				December 31, 2016

Exercise of options outstanding			17,000				42,000
Time-based restricted stock units outstanding			212,734				197,734
Performance-based restricted stock units outstanding			400,000				200,000
Future grants of options or shares			379,266				619,266
Shares reserved for employee stock purchase plan			177,280				268,211

Total			1,186,280				1,327,211