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Segment Information, Reconciliation of Assets from Segment to Consolidated (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets $ 45,999us-gaap_Assets $ 48,827us-gaap_Assets
Performance Improvement Solutions [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 38,309us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= gvp_PerformanceImprovementSolutionsMember		 48,827us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= gvp_PerformanceImprovementSolutionsMember
Staff Augmentation [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 8,090us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= gvp_StaffAugmentationMember		 0us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= gvp_StaffAugmentationMember
Intersegment Eliminations [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets $ (400)us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_IntersegmentEliminationMember		 $ 0us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_IntersegmentEliminationMember