Schedule II Valuation and Qualifying accounts (Details) (Allowance for Doubtful Accounts [Member], USD $)	12 Months Ended
	Dec. 29, 2012		Dec. 31, 2011		Jan. 01, 2011
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 423,000		$ 519,000		$ 392,000
Charged to Costs and Expenses	147,313		44,502		177,186
Charged to Other Accounts
Deductions	83,313	[1]	140,502	[1]	50,186	[1]
Balance at End of Period	$ 487,000		$ 423,000		$ 519,000

[1] Uncollectible accounts written off, net of recoveries.