Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

(in thousands)	2016		2015		2014
Weighted average common shares outstanding		26,659		26,057		25,393
Effect of dilutive stock options and restricted stock units		821		731		613
		27,480		26,788		26,006

Property, Plant and Equipment [Table Text Block]

	December 31,			December 26,
	2016			2015
Land and land improvements	$	4,079		$	4,607
Buildings and building improvements		7,967			8,971
Machinery and equipment		35,157			31,888
		47,203			45,466
Less accumulated depreciation and amortization		(28,969	)		(26,466	)
Property, plant and equipment, net	$	18,234		$	19,000