Accrued Warranty (Details) (USD $)	12 Months Ended
	Dec. 27, 2014	Dec. 28, 2013
Product Warranties Disclosures [Abstract]
Product warranty term	12 months
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning Balance	$ 716,000	$ 716,000
Additions	389,000	798,000
Claims and reversals	(389,000)	(798,000)
Ending Balance	$ 716,000	$ 716,000