Accounts Receivables (Details Textual) (USD $) In Millions, unless otherwise specified	Jan. 01, 2012	Jan. 02, 2011
Accounts Receivables (Textual) [Abstract]
Billed receivables, Long term contract	$ 18.3	$ 17.6
Unbilled receivables, Long term contract	$ 19.6	$ 26.4

The total amount of unbilled receivables from customers under long-term contracts that have not been billed and were not billable at the balance sheet date.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 910

-SubTopic 310

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6471494&loc=d3e49336-109356

Name:	us-gaap_UnbilledReceivablesNotBillableAtBalanceSheetDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant