Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jul. 01, 2012	Jan. 01, 2012
Condensed Consolidated Balance Sheets [Abstract]
Property and equipment, accumulated depreciation and amortization	$ 68,696	$ 66,272
Deferred charges, accumulated amortization	$ 945	$ 986
Common stock, par value	$ 0.05	$ 0.05
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	5,999,735	5,993,453
Common stock, shares outstanding	5,999,735	5,993,453
Preferred stock, shares authorized	1,000,000	1,000,000