Long-Term Investment - Additional Information (Detail) (USD $)	Dec. 30, 2012
Investment [Line Items]
Potential capital commitments	$ 0
Skypoint Fund [Member]
Investment [Line Items]
Carrying amount of capital contributions to venture capital fund	15,000
Carrying amount of long-term investment net of capital contributions, cumulative impairment charges and capital distributions	1,300,000
Aggregate from July 2001 [Member]
Investment [Line Items]
Carrying amount of capital contributions to venture capital fund	$ 4,800,000

Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

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

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