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BUSINESS COMBINATIONS (Details) (USD $)
12 Months Ended 0 Months Ended
Mar. 31, 2014
Aug. 18, 2014
Nov. 14, 2013
Mar. 31, 2015
Business Acquisition [Line Items]        
Contingent consideration payout $ 1,300,000plus_BusinessAcquisitionContingentConsiderationCashPayment      
Recognized goodwill related to acquisition 29,570,000us-gaap_Goodwill     34,112,000us-gaap_Goodwill
Evolve Technology Group [Member]        
Business Acquisition [Line Items]        
Purchase price   10,500,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= plus_EvolveTechnologyGroupMember
   
Fair value of contingent consideration   2,000,000us-gaap_BusinessCombinationLiabilitiesArisingFromContingenciesAmountRecognized
/ us-gaap_BusinessAcquisitionAxis
= plus_EvolveTechnologyGroupMember
   
Contingent consideration payout period   3 years    
Other net assets   600,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
/ us-gaap_BusinessAcquisitionAxis
= plus_EvolveTechnologyGroupMember
   
Evolve Technology Group [Member] | Maximum [Member]        
Business Acquisition [Line Items]        
Contingent consideration payout   2,500,000plus_BusinessAcquisitionContingentConsiderationCashPayment
/ us-gaap_BusinessAcquisitionAxis
= plus_EvolveTechnologyGroupMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Evolve Technology Group [Member] | Customer Relationships [Member]        
Business Acquisition [Line Items]        
Identifiable intangible assets   4,000,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= plus_EvolveTechnologyGroupMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
   
Estimated useful life   6 years    
Evolve Technology Group [Member] | Technology Reporting Unit [Member]        
Business Acquisition [Line Items]        
Recognized goodwill related to acquisition   4,500,000us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= plus_EvolveTechnologyGroupMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= plus_TechnologyReportingUnitMember
   
AdviStor, Inc. [Member]        
Business Acquisition [Line Items]        
Cash paid     2,800,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= plus_AdvistorIncMember
 
Other net assets     400,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
/ us-gaap_BusinessAcquisitionAxis
= plus_AdvistorIncMember
 
AdviStor, Inc. [Member] | Customer Relationships [Member]        
Business Acquisition [Line Items]        
Identifiable intangible assets     1,600,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= plus_AdvistorIncMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
 
Estimated useful life     6 years  
AdviStor, Inc. [Member] | Technology Reporting Unit [Member]        
Business Acquisition [Line Items]        
Recognized goodwill related to acquisition     $ 900,000us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= plus_AdvistorIncMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= plus_TechnologyReportingUnitMember