Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Sep. 24, 2011	Dec. 25, 2010
Current Assets:
Allowance for doubtful accounts on accounts receivable	$ 61	$ 121
Common Class A
Stockholders' Equity:
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	22,700,000	22,700,000
Common stock, shares issued	8,758,572	9,288,015
Common stock, shares outstanding	8,758,572	9,288,015
Common Class B
Stockholders' Equity:
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	4,200,000	4,200,000
Common stock, shares issued	4,107,355	4,107,355
Common stock, shares outstanding	4,107,355	4,107,355