Commitments and Contingencies (Details Textual) (USD $) In Millions, unless otherwise specified	Dec. 28, 2013
Commitments and Contingencies [Textual]
Purchase price of building	$ 7.6

Amount of acquisition and modification cost of a business combination allocated to buildings included in real estate.

No definition available.

Name:	psem_BusinessAcquisitionPurchasePriceAllocationBuildings1
Namespace Prefix:	psem_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant