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Stock Options Plans and Stock-Based Compensation (Details) - USD ($) $ in Millions | 12 Months Ended
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Jan. 02, 2016 | Dec. 27, 2014 | Dec. 28, 2013
Fair value of each option grant computed on the grant date |  |  |
Risk-free interest rate, minimum | 1.47% | 1.65% | 0.90%
Risk-free interest rate, maximum | 1.75% | 1.69% | 1.77%
Expected volatility, minimum | 46.50% | 52.80% | 54.00%
Expected volatility, maximum | 52.40% | 56.00% | 58.00%
Minimum [Member] |  |  |
Fair value of each option grant computed on the grant date |  |  |
Expected life | 3 years 10 months 55 days | 3 years 10 months 27 days | 4 years 10 days
Maximum [Member] |  |  |
Fair value of each option grant computed on the grant date |  |  |
Expected life | 4 years 9 days | 4 years | 4 years 2 months 15 days
Employee Stock Option [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock Based Compensation Expense Expects to Recognize in Year One | $ 2.6 |  |
Stock Based Compensation Expense Expects to Recognize in Year Two | 1.9 |  |
Stock Based Compensation Expense Expects to Recognize in Year Three | 1.3 |  |
Stock Based Compensation Expense Expects to Recognize in Year Four | $ 0.6 |  |

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- Definition The estimated measure of the maximum 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. + References No definition available. + Details
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- Definition The estimated measure of the minimum 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. + References No definition available. + Details
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- Definition The maximum risk-free interest rate assumption that is used in valuing an option on its own shares. + References No definition available. + Details
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2 + Details
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