Stockholders' Equity (Details 3) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Jan. 03, 2014	Dec. 28, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Outstanding at January 3, 2014	3,299	3,376
Options Outstanding Weighted - Average Remaining Contractual Life	6 years 3 months 7 days
Weighted - Average Exercise Price	$ 6.17	$ 5.89
Number Exercisable at January 3, 2014	2,168
Weighted - Average Exercise Price	$ 5.30
Range One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Lower Range of Exercise Prices	$ 0.95
Number Outstanding at January 3, 2014	29
Options Outstanding Weighted - Average Remaining Contractual Life	5 years 2 months 26 days
Weighted - Average Exercise Price	$ 0.95
Number Exercisable at January 3, 2014	29
Weighted - Average Exercise Price	$ 0.95
Range Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Lower Range of Exercise Prices	$ 1.56
Upper Range of Exercise Prices	$ 2.30
Number Outstanding at January 3, 2014	320
Options Outstanding Weighted - Average Remaining Contractual Life	4 years 3 months 18 days
Weighted - Average Exercise Price	$ 2.19
Number Exercisable at January 3, 2014	320
Weighted - Average Exercise Price	$ 2.19
Range Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Lower Range of Exercise Prices	$ 2.45
Upper Range of Exercise Prices	$ 3.60
Number Outstanding at January 3, 2014	177
Options Outstanding Weighted - Average Remaining Contractual Life	5 years 5 months 23 days
Weighted - Average Exercise Price	$ 3.29
Number Exercisable at January 3, 2014	177
Weighted - Average Exercise Price	$ 3.29
Range Four [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Lower Range of Exercise Prices	$ 3.75
Upper Range of Exercise Prices	$ 5.29
Number Outstanding at January 3, 2014	506
Options Outstanding Weighted - Average Remaining Contractual Life	3 years 1 month 28 days
Weighted - Average Exercise Price	$ 4.22
Number Exercisable at January 3, 2014	497
Weighted - Average Exercise Price	$ 4.20
Range Five [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Lower Range of Exercise Prices	$ 5.34
Upper Range of Exercise Prices	$ 7.32
Number Outstanding at January 3, 2014	1,457
Options Outstanding Weighted - Average Remaining Contractual Life	6 years 11 months 16 days
Weighted - Average Exercise Price	$ 5.71
Number Exercisable at January 3, 2014	817
Weighted - Average Exercise Price	$ 5.89
Range Six [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Lower Range of Exercise Prices	$ 7.50
Upper Range of Exercise Prices	$ 13.34
Number Outstanding at January 3, 2014	810
Options Outstanding Weighted - Average Remaining Contractual Life	7 years 11 months 8 days
Weighted - Average Exercise Price	$ 10.61
Number Exercisable at January 3, 2014	328
Weighted - Average Exercise Price	$ 10.00

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

+ Details

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- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average remaining contractual term for option awards outstanding, 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 50

-Paragraph 2

-Subparagraph (e)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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