Schedule II - Valuation and Qualifying accounts (Details) - Allowance for Doubtful Accounts [Member] - USD ($)		12 Months Ended
		Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		$ 450,000	$ 414,000	$ 410,000
Charged to Costs and Expenses		0	52,144	71,927
Charged to Other Accounts - Describe
Deductions - Describe	[1]	20,000	16,144	67,927
Balance at End of Period		$ 430,000	$ 450,000	$ 414,000

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