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Business Combinations (Details) (USD $)
In Millions, unless otherwise specified
0 Months Ended 3 Months Ended 0 Months Ended 7 Months Ended 0 Months Ended
Sep. 04, 2014
Mar. 28, 2015
Jan. 10, 2015
Mar. 28, 2015
Jan. 10, 2017
Jan. 10, 2016
Business Acquisition [Line Items]            
Total acquisition consideration $ 52us-gaap_BusinessCombinationConsiderationTransferred1          
Amount of consideration transferred remaining   24pmcs_BusinessCombinationConsiderationRemaining        
Reimbursement Revenue   3.3us-gaap_ReimbursementRevenue        
Cost reimbursement payments   25us-gaap_AccountsReceivableGross   25us-gaap_AccountsReceivableGross    
RAID Software [Member]            
Business Acquisition [Line Items]            
Installment payment 10us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= pmcs_RaidSoftwareMember
  18us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= pmcs_RaidSoftwareMember
     
Reimbursement Revenue       7.3us-gaap_ReimbursementRevenue
/ us-gaap_BusinessAcquisitionAxis
= pmcs_RaidSoftwareMember
   
Forecast [Member] | RAID Software [Member]            
Business Acquisition [Line Items]            
Installment payment         $ 12us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= pmcs_RaidSoftwareMember
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
$ 12us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= pmcs_RaidSoftwareMember
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember