Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	6 Months Ended			0 Months Ended
Jun. 28, 2013	Dec. 28, 2012	Mar. 21, 2012	Aug. 06, 2013 Subsequent Event [Member] Scenario, Plan [Member] 2013 Tender Offer [Member]	Aug. 06, 2013 Maximum [Member] Subsequent Event [Member] Scenario, Plan [Member] 2013 Tender Offer [Member]	Aug. 06, 2013 Minimum [Member] Subsequent Event [Member] Scenario, Plan [Member] 2013 Tender Offer [Member]
Stock repurchase authorized	$ 5.0			$ 35.8
Common stock, par value	$ 0.001	$ 0.001
Purchase price per share	$ 4.80				$ 6.50	$ 5.75
Percentage of issued and outstanding shares repurchased in tender offer			27.00%		17.00%

Face amount or stated value of common stock per share; generally not indicative of the fair market value per share.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant