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Acquisition (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Nov. 14, 2014
Business Combinations Purchase Price Allocation [Abstract]        
Goodwill $ 5,612us-gaap_Goodwill   $ 5,612us-gaap_Goodwill  
Business Acquisition, Pro Forma Information [Abstract]        
Revenue 13,996us-gaap_BusinessAcquisitionsProFormaRevenue 13,208us-gaap_BusinessAcquisitionsProFormaRevenue    
Operating loss (446)us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax (2,101)us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax    
Net loss (592)us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss (2,031)us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss    
Loss per common share - basic $ (0.03)us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic $ (0.11)us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic    
Loss per common share - diluted $ (0.03)us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted $ (0.11)us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted    
Hyperspring, LLC [Member]        
Business Acquisition [Line Items]        
Business Acquisition, Name of Acquired Entity Hyperspring, LLC      
Business Acquisition, Effective Date of Acquisition Nov. 14, 2014      
Percentage of ownership interest acquired (in hundredths)       100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High       11,400us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
Cash purchase price 3,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
  3,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
 
Fair value of contingent consideration     3,953us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
 
Total purchase price     6,953us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
 
Business Combinations Purchase Price Allocation [Abstract]        
Cash       152us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
Contract receivables       1,719us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
Prepaid expenses and other current assets       23us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
Property, plant and equipment, net       12us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
Intangible assets       779us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
Goodwill       5,612us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
Total assets       8,297us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
Line of credit       749us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
Accounts payable, accrued expenses and other liabilities       586us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
Billings in excess of revenue earned       9us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
Total liabilities       1,344us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
Net assets acquired       6,953us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
Hyperspring, LLC [Member] | Contingent Consideration Case 1 [Member]        
Business Acquisition [Line Items]        
Business Acquisition Contingent Consideration Agreement for the three-year period ending November 13, 2017      
Hyperspring, LLC [Member] | Contingent Consideration Case 1 [Member] | EBITDA Target [Member]        
Business Acquisition [Line Items]        
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High       7,200us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
/ gvp_ContingentConsiderationByType1Axis
= gvp_ContingentConsiderationCase1Member
/ us-gaap_ContingentConsiderationByTypeAxis
= gvp_EBITDATargetMember
Business Combination, Contingent Consideration Arrangements, Description the $1.2 million TVA payment is divided into three increments of $400,000 each and are added to the annual payments which will be made to the former Hyperspring members if they achieved certain EBITDA (earnings before interest, taxes, depreciation and amortization) targets for the three-year period ending November 13, 2017.      
Hyperspring, LLC [Member] | Contingent Consideration Case 1 [Member] | Tennessee Valley Authority Renewal Target [Member]        
Business Acquisition [Line Items]        
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High       1,200us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
/ gvp_ContingentConsiderationByType1Axis
= gvp_ContingentConsiderationCase1Member
/ us-gaap_ContingentConsiderationByTypeAxis
= gvp_TennesseeValleyAuthorityRenewalTargetMember
Business Combination, Contingent Consideration Arrangements, Description if Hyperspring was successful in renewing its contract with the Tennessee Valley Authority ("TVA") on or before May 15, 2015 for a two year period for substantially the same scope as was currently being provided and with substantially the same economics.      
Hyperspring, LLC [Member] | Contingent Consideration Case 2 [Member]        
Business Acquisition [Line Items]        
Business Acquisition Contingent Consideration Agreement for the three-year period ending November 13, 2017      
Hyperspring, LLC [Member] | Contingent Consideration Case 2 [Member] | EBITDA Target [Member]        
Business Acquisition [Line Items]        
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High       8,400us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
/ gvp_ContingentConsiderationByType1Axis
= gvp_ContingentConsiderationCase2Member
/ us-gaap_ContingentConsiderationByTypeAxis
= gvp_EBITDATargetMember
Business Combination, Contingent Consideration Arrangements, Description certain EBITDA (earnings before interest, taxes, depreciation and amortization) targets      
Hyperspring, LLC [Member] | Contractual Customer Relationships [Member]        
Business Combinations Purchase Price Allocation [Abstract]        
Intangible assets       779us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerContractsMember
Hyperspring, LLC [Member] | Contractual Customer Relationships [Member] | Maximum [Member]        
Business Acquisition [Line Items]        
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 7 years      
Hyperspring, LLC [Member] | Customer Relationships [Member]        
Business Combinations Purchase Price Allocation [Abstract]        
Intangible assets       0us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Hyperspring, LLC [Member] | Developed Technology [Member]        
Business Combinations Purchase Price Allocation [Abstract]        
Intangible assets       0us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
Hyperspring, LLC [Member] | In Process Research and Development [Member]        
Business Combinations Purchase Price Allocation [Abstract]        
Intangible assets       0us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
Hyperspring, LLC [Member] | Domain Names and Other Marketing Related [Member]        
Business Combinations Purchase Price Allocation [Abstract]        
Intangible assets       0us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= gvp_HyperspringLlcMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InternetDomainNamesMember
IntelliQlik, LLC [Member]        
Business Acquisition [Line Items]        
Business Acquisition, Name of Acquired Entity IntelliQlik, LLC      
Business Acquisition, Effective Date of Acquisition Nov. 14, 2014      
Percentage of ownership interest acquired (in hundredths)       50.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= gvp_IntelliqlikLlcMember
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High       250us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
/ us-gaap_BusinessAcquisitionAxis
= gvp_IntelliqlikLlcMember
Payments to Acquire Equity Method Investments     $ 250us-gaap_PaymentsToAcquireEquityMethodInvestments
/ us-gaap_BusinessAcquisitionAxis
= gvp_IntelliqlikLlcMember