Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 29, 2013

Accounting Policies [Abstract]

Significant Weighted Average Assumptions Used for Estimating the Fair Value Under Stock Option Plans

The following are the significant weighted average assumptions used for estimating the fair value under our stock option plans:

	Three months ended					Six months ended
	June 29, 2013		June 30, 2012			June 29, 2013			June 30, 2012
Expected life in years		—		4.0			4.0			4.0
Risk free interest rate		—		0.5	%		0.6	%		0.6	%
Expected volatility		—		99	%		93.3	%		100	%
Dividend yield		—		0	%		0	%		0	%

Total Stock-Based Compensation Expense

The following table presents details of total stock-based compensation expense that is included in each functional line item on our condensed consolidated statements of operations:

	Three months ended				Six months ended
	June 29, 2013		June 30, 2012		June 29, 2013		June 30, 2012
Cost of revenue	$	1,000	$	3,000	$	1,000	$	8,000
Research and development		45,000		77,000		100,000		178,000
Selling, general and administrative		83,000		158,000		194,000		373,000
Total stock-based compensation expense	$	129,000	$	238,000	$	295,000	$	559,000