Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 27, 2015	Dec. 27, 2014
Trade receivables, allowances (in Dollars)	$ 1,150	$ 1,184
Common stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares outstanding	28,110,743	27,732,030
Common stock, shares issued	29,091,842	28,713,129
Treasury stock, shares	981,099	981,099