CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Sep. 26, 2015	Dec. 27, 2014
CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 179	$ 106
Accumulated depreciation (in dollars)	$ 44,581	$ 40,179
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	50,000	50,000
Common stock, shares issued	19,977	19,961
Common stock, shares outstanding	19,977	19,961
Treasury stock, shares	368	368