Accounts Receivable and Allowances for Doubtful Accounts (Details Textual)	Oct. 01, 2011 Customer	Jan. 01, 2011 Customer
Accounts Receivable and Allowances for Doubtful Accounts (Textual) [Abstract]
Number of customers with accounts receivable and contract receivable balance greater than 10% of total balance	0	1
Percent of Receivables and Installment Contract Receivables Attributable to Single Customer	10.00%	19.00%
Percentage of Company's total Receivables, net and Installment contract receivables, net attributable to the ten customers with largest balance	40.00%	50.00%