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Revenue Recognition (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
item
Revenue Recognition  
Number of criteria 4wstg_RevenueRecognitionNumberOfCriteriaToBeFulfilled
Additional cost to obtain technical support directly from the software publisher and upgrade to latest technology $ 0wstg_AdditionalCostToObtainTechnicalSupportAndUpgradeUnderMaintenanceAgreement