Stockholders' Equity (Details)	12 Months Ended
Dec. 31, 2011 Y	Jan. 01, 2011 Y	Jan. 02, 2010 Y
Fair value of stock option granted
Expected option life	4.1	4.2	3.72
Black-Scholes-Merton [Member]
Fair value of stock option granted
Weighted average risk free rate of return	1.61%	1.72%	1.84%
Dividend yield	0.00%	0.00%	0.00%
Expected volatility of the market price of the Company's common stock	57.70%	56.80%	59.30%
Expected option life	4.10	4.20	3.72

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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