CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 28, 2013	Dec. 29, 2012
CONDENSED CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 209	$ 222
Accumulated depreciation (in dollars)	$ 32,472	$ 28,524
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	50,000	50,000
Common stock, shares issued	19,842	19,571
Common stock, shares outstanding	19,842	19,571
Treasury stock, shares	368	368