Equity and Stock Based Compensation Plans (Details)	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Stock Options [Member]
Assumption of stock option's fair value
Expected life		4 years 7 months 6 days	4 years 7 months 6 days	4 years 6 months
Expected volatility		64.38%	54.86%	71.04%
Risk-free interest rate		1.52%	1.54%	1.00%
Dividends		0.00%	0.00%	0.00%
Employee Stock Purchase Plan [Member]
Assumption of stock option's fair value
Expected life	6 months	6 months	6 months	6 months
Expected volatility	29.64%	25.94%	32.60%	26.75%
Risk-free interest rate	0.06%	0.10%	0.54%	0.11%
Dividends	0.00%	0.00%	0.00%	0.00%