CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Sep. 24, 2016	Dec. 26, 2015
CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 140	$ 94
Accumulated depreciation (in dollars)	$ 51,349	$ 46,328
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	50,000	50,000
Common stock, shares issued	20,039	19,979
Common stock, shares outstanding	20,039	19,979
Treasury stock, shares	368	368