Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016
Intangible assets
Gross Carrying Amount	$ 1,469,000	$ 1,249,000
Accumulated Amortization	983,000	895,000
Net Amount	$ 486,000	$ 354,000
Remaining weighted average period	5 years 4 months 24 days