Annual report pursuant to Section 13 and 15(d)

Long-term Debt (Line of Credit) (Details)

v2.4.0.6
Long-term Debt (Line of Credit) (Details) (USD $)
 0 Months Ended 12 Months Ended
Oct. 22, 2012
Aug. 21, 2012
Aug. 19, 2011
Dec. 29, 2012
Dec. 31, 2011
Jan. 01, 2011
Jun. 30, 2010
Line of Credit Facility [Line Items]              
Variable rate basis       LIBOR      
Revolving Line of Credit [Member]
              
Line of Credit Facility [Line Items]              
Stated interest rate (percent)       2.21% 1.78% 1.76%  
Unused capacity fee on line of credit (percent)       0.125%      
Line of credit, maximum borrowing capacity $ 30,000,000 $ 25,000,000   $ 30,000,000     $ 20,000,000
Debt extension period (years) 1 year   1 year        
Increase in borrowing capacity 5,000,000 5,000,000          
Line of credit, amount outstanding       18,060,894      
Line of credit, remaining availability       11,939,106      
Line of credit, average outstanding amount       11,045,000 5,663,000 1,079,000  
Line of credit, weighted average interest rate (percent)       1.82% 1.73% 1.82%  
Interest payments       $ 492,000 $ 114,000 $ 37,000