Discontinued Operations (Details textual) (USD $)	3 Months Ended	0 Months Ended
Oct. 02, 2011 Asset Purchase Agreement [Member]	Aug. 03, 2012 Synaptics asset purchase agreement [Member]	Aug. 01, 2012 Synaptics asset purchase agreement [Member] Employees
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Escrow Deposits Related to Property Sales	$ 6,000,000
Disposal Group, Including Discontinued Operation, Holding Period for Escrow Deposit	2 years
Gain (Loss) on divestiture	$ 45,900,000	$ 886,000
Employees transferred to Synaptics			47

Escrow deposits related to property sales in noncash investing and financing activities.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 32

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration