Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 26, 2015
Statement of Financial Position [Abstract]
Trade receivables, allowances	$ 422	$ 1,150
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares outstanding	27,190,082	28,058,513
Common stock, shares issued	27,190,082	28,058,513