Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Sep. 26, 2015	Oct. 01, 2016	Sep. 26, 2015
Income Statement [Abstract]
Net revenues	$ 22,000	$ 91,000	$ 122,000	$ 217,000
Costs and expenses:
Cost of revenues	962,000	794,000	2,796,000	2,238,000
Research and development	676,000	772,000	2,093,000	3,246,000
Selling, general and administrative	1,231,000	1,411,000	3,814,000	4,256,000
Total costs and expenses	2,869,000	2,977,000	8,703,000	9,740,000
Loss from operations	(2,847,000)	(2,886,000)	(8,581,000)	(9,523,000)
Other Income and Expense:
Adjustments to fair value of warrant derivatives	18,000	503,000	38,000	3,886,000
Adjustments to warrant exercise price	(47,000)		(47,000)	(367,000)
Other (expense) income	2,000	10,000	8,000	(199,000)
Net loss	$ (2,874,000)	$ (2,373,000)	$ (8,582,000)	$ (6,203,000)
Basic and diluted net loss per common share	$ (0.93)	$ (2.08)	$ (3.06)	$ (5.80)
Basic and diluted weighted average number of common shares outstanding	3,085,403	1,143,188	2,806,658	1,069,110