Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Details Textual)

v2.4.1.9
Summary of Significant Accounting Policies (Details Textual) (USD $)
12 Months Ended 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Jun. 30, 2015
Apr. 02, 2013
acre
Property, Plant and Equipment [Line Items]          
Area of Real Estate Property         16us-gaap_AreaOfRealEstateProperty
Impairment of Long-Lived Assets to be Disposed of $ 100,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf        
Depreciation 1,000,000us-gaap_Depreciation 600,000us-gaap_Depreciation 500,000us-gaap_Depreciation    
Shipping, Handling and Transportation Costs 900,000us-gaap_ShippingHandlingAndTransportationCosts 1,400,000us-gaap_ShippingHandlingAndTransportationCosts 700,000us-gaap_ShippingHandlingAndTransportationCosts    
Land available-for-sale [Member]          
Property, Plant and Equipment [Line Items]          
Area of Real Estate Property 4us-gaap_AreaOfRealEstateProperty
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= wstl_LandavailableforsaleMember
       
Land [Member]          
Property, Plant and Equipment [Line Items]          
Area of Real Estate Property 12us-gaap_AreaOfRealEstateProperty
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
       
Land available-for-sale [Member]          
Property, Plant and Equipment [Line Items]          
Proceeds from Sale of Property Held-for-sale       $ 264,000us-gaap_ProceedsFromSaleOfPropertyHeldForSale
/ us-gaap_SubsequentEventTypeAxis
= wstl_LandavailableforsaleMember