Summary of Significant Accounting Policies (Details) (USD $)	6 Months Ended		12 Months Ended
	Jan. 01, 2012	Jan. 02, 2011	Dec. 29, 2013	Dec. 30, 2012	Jan. 01, 2012	Jul. 03, 2011	Jun. 27, 2010
Significant Accounting Policies [Line Items]
Number of weeks in fiscal year			P52W	P53W			P52W
Number of weeks in transition period	P26W
Reverse stock split conversion ratio			0.1
Restricted cash	$ 262,000		$ 262,000	$ 262,000	$ 262,000
Impairment of goodwill	0		0	0			0
Tax benefit recorded on stock compensation expense	0		0	0			0
Research and development expense	2,103,000	2,069,000	3,246,000	3,834,000	4,394,000	4,360,000
Advertising expense	26,000		58,000	88,000		74,000
Patents [Member]
Significant Accounting Policies [Line Items]
Gross cost of patents	533,000		533,000		533,000
Estimated useful life of patents			10 years
Accumulated amortization of patents	238,000		291,000		238,000
Net carrying value of patents	$ 295,000		$ 242,000		$ 295,000
Machinery and Equipment [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives			5 years
Machinery and Equipment [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives			10 years
Buildings and Leasehold Improvements [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives			10 years
Buildings and Leasehold Improvements [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives			40 years